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Silent Thunder Ordnance designs and manufactures the world's quietest airgun moderators, record-breaking flashlights, precision EDC tools, slingshots, optics accessories, and glow products, all engineered and tested in-house in the USA. Browse the full catalog including free 3D printable designs from the Libre and Non Sequitur sections. Performance through engineering, every single product.
The Accipiter line exists for shooters who need the absolute best performance-to-weight ratio we can deliver. There's a saying in engineering: the last 5% takes as much work as the first 95%. The Accipiter line is that last 5%. These are not fundamentally different moderators from our Falx and Sarissa; they use the same proven gas diode and damping architecture. What's different is that every single element has been reanalyzed and pushed as far as it can go in the direction of reduced weight and improved acoustic performance. The result is a moderator that's over a third lighter than its standard counterpart while improving on its acoustic performance. That doesn't come free; the Accipiter line requires substantially more effort to manufacture and is priced accordingly.
Two body sizes are available, corresponding to the Falx and Sarissa dimensional envelopes. The bodies themselves are visually distinct from the standard line: the aluminum tube is thinner-walled than its standard counterpart, and each Accipiter carries our falling feather logo engraved on the side. Weights by configuration:
Falx-size, Standard Flow: 115 grams
Falx-size, Moderate Flow: 107 grams
Sarissa-size, Standard Flow: 172 grams
Sarissa-size, Moderate Flow: 155 grams
The design uses Nikola Tesla's Gas Diode to reflex propellant air back on itself, resisting forward flow through geometry alone with no moving parts. This three-stage approach first strips air off the pellet to reduce turbulence and improve accuracy, then delays it through compound gas diode stages, and finally passes it through a high-performance damping section to absorb residual sound energy. The design adapts along its length rather than repeating a single approach end to end, applying the right technique at the right point in the air's journey through the moderator.
The anodized aluminum tube is serviceable and modular. Cores can be swapped as the technology advances, meaning an Accipiter purchased today can be upgraded rather than replaced as new revisions become available. All designs are considered experimental.
Key Features:
Tesla Gas Diode design: Compound diode stages reflex and delay propellant air through geometry alone, no moving parts
Adaptive staged architecture: Design transitions along its length to maximize attenuation at each point in the air's travel
Tapered bore: Improves sound attenuation while reducing the likelihood of pellet clipping
Ultra-light composite cores: New composite material cuts core mass by more than 50% compared to the standard line without sacrificing acoustic performance
Thinned aluminum tube: Lighter wall thickness reduces overall weight while maintaining the serviceable modular architecture of the standard line
Flow factor variants: Standard and Moderate flow cores available
Falling feather engraving: Exclusive to the Accipiter line
Built and tested in the USA
Select the body size and core whose flow factor most closely matches your rifle's calculated value. Information on calculating your rifle's flow factor can be found in our Moderator Configuration & Optimization guide.
This product is intended for airgun use only. Use of this product in any manner inconsistent with its design intent is a violation of federal law. More information about the federal court ruling which clarified the legality of airgun moderators in the United States can be found here. Local restrictions may still apply. It is the responsibility of the buyer to ensure compliance with all applicable laws.
This item ships within the United States only.
The Umarex Avera delivers endless fun at an affordable price, but its noticeable "pop" can limit where and when you shoot. This carbon fiber reinforced ABS moderator transforms your Avera from producing a sharp pop to a sound so subtle you'll think the pistol is running out of CO2. Designed specifically for the Avera's profile and sealing via an o-ring seal at the muzzle, it keeps your backyard shooting sessions genuinely neighbor-friendly.
Key Features
Dramatic Sound Reduction - Reduces report from a noticeable "pop" to a barely audible sound; multiple testers thought the pistol was out of CO2 during testing
Offset Baffle Design - Engineered baffle configuration with tapered bore minimizes the risk of baffle strikes while maximizing sound attenuation
Avera-Specific Fit - Designed exclusively for the Umarex Avera; attaches via existing Picatinny rail and seals at muzzle with integrated o-ring
Mounting Options - Standard version (52mm height, under 60g) or rail-equipped version (62mm height, under 70g) that adds bottom Picatinny rail for accessories
Durable Construction - Carbon fiber reinforced ABS provides impact resistance for extended service life
Secure Installation - Metal threaded inserts ensure purely metal-on-metal contact; requires 3mm hex key (not included) for installation
Low-Profile Design - Matches Avera's 25.5mm width and profile; clears factory iron sights; adds only 70mm to overall pistol length (150mm total moderator length)
Optional Action Cover - Available add-on that shrouds the cylinder gap, muffling and dispersing the CO2/sound leakage inherent to revolver designs
The Avera is known for delivering fun, affordable shooting—this moderator keeps that fun going without disturbing your surroundings. Whether you're practicing in your backyard or running through multiple magazines at the range, the dramatic noise reduction makes every shooting session more enjoyable and discreet.
Note: To anyone looking at the pictures and not familiar with the Avera, the muzzle brake is decorative, the barrel actually exits below it.
This product is intended for AIRGUN USE ONLY. It is a violation of federal law to use this product in a manner inconsistent with its design intent. More information about the federal court ruling which clarified the legality of airgun moderators within the United States can be found HERE. Local restrictions may still apply. It is the responsibility of the buyer to ensure they are in compliance with all applicable laws.
United States Orders Only.
The KNIPEX Cobra XS is already one of the most capable compact pliers available. This sheath keeps it that way. At 15 grams, the Cobra Carrier adds a deep-carry pocket clip and five-sided coverage without meaningfully changing your carry weight or pocket profile. Sweat stays off the tool; the Cobra's hardened jaws stay off everything else in your pocket.
Key Features:
Precision fit: Designed specifically for the KNIPEX Cobra XS 4-Inch Water Pump Pliers and Knipex Pliers Wrench 4 inch
15 grams: Near-zero bulk addition to an already minimal tool
Five-sided coverage: Protects the tool from sweat and pocket contents from hardened jaws
Deep-carry pocket clip: Carbon fiber reinforced polyamide clip keeps the Cobra secure and discreet
ABS body: Impact-resistant sheath construction
At 15 grams, the Cobra Carrier adds carry capability without adding carry weight. If you're already pocketing a Cobra XS, or want to, this is the obvious next step.
Fire where you need it, when you need it, no questions asked. Waterproof, windproof, and built to handle extreme temperatures, this compact ferro rod is designed to last virtually forever. An essential for your everyday carry, bugout bag, or survival kit.
Unlike traditional flint and steel, ferro rods are made from an iron and rare earth metal alloy that produces sparks exceeding 5,000°F when struck, with no fuel to leak, no batteries to fail, and nothing to degrade over time. Strike with virtually any sharp edge, from a knife spine to a jagged rock. Every rod includes our custom multi-function striker.
Key Features
High Performance: 5/16" diameter with 2-1/2" of exposed rod for easy, high-temperature strikes. Capable of thousands of ignitions, providing a reliable fire source for years to come
Ergonomic Design: Shaped for a secure grip and precise control, with a lanyard hole for easy attachment and a variety of attractive finishes to choose from
Potent Glow: Select versions feature glow-in-the-dark handles powered by strontium aluminate, the brightest and longest-lasting glow technology available. Green glows brightest and longest; purple requires sunlight or UV to fully charge. Charge with any bright light; UV (320–400nm) works best. Learn more about our glow tech.
Unmatched Durability: Built to withstand the elements and perform in any survival situation, so fire is always within reach
Multi-Function Striker: Purpose-built from 316 stainless steel, featuring a concave scraping surface for enhanced control, integrated prybar and slotted screwdriver end, tapered center shackle wrench, and an optional upgrade to Grade 5 titanium (6Al4V)
No fuel. No batteries. No expiration date. If you need fire, this starts it.
Spyderco's Mule Team puts cutting-edge blade steels within reach, but completing the knife usually means hunting down aftermarket handles and a sheath separately, often spending as much as the blade itself. We built this system to change that. Handles, sheath, and modular carry clips designed together, priced to keep the Mule Team's accessibility intact without asking you to settle on ergonomics or retention.
The handles take Spyderco's ergonomic obsession seriously. Deep three-dimensional compound curves fill the palm naturally, optimizing thumb placement for pinch grip and providing positive retention in saber grip under load. The sheath engages the blade's rear hump, not the handles, so retention is rock-solid regardless of carry orientation. Together they turn a bare Mule blank into a complete, field-ready fixed blade.
Key Features:
Complete carry system: Handles, high-retention sheath, modular J-clip, and MOLLE clip included, everything needed to field a finished Mule Team knife
Spyderco-inspired ergonomics: Three-dimensional compound curves designed to fill the hand's natural shape, with optimized pinch grip geometry and pinkie clearance for high-force cutting tasks
Orientation-independent retention: Sheath retention engages blade geometry, not handle profile, knife stays seated inverted, horizontal, or under hard use
360-degree carry flexibility: J-clip and MOLLE clip both mount at any angle, horizontal, 45-degree cant, vertical, or inverted, for OWB, IWB, or pack carry
User-serviceable retention: Retention springs are field-replaceable; alternate tension options available
Recessed hardware: Chicago-screw mounting points are countersunk to eliminate pressure points during extended carry
Lume-ready lanyard hole: Accepts 6.3x11.5mm Lume Insert for low-light retrieval
Material options: ABS as standard; advanced materials including PPS and epoxy composites available for enhanced performance and dressy appearance
Eyeshine Targets are reactive glow targets designed for night hunting practice. Green strontium aluminate eyes provide maximum brightness and duration, visible to the naked eye and through night vision. Self-healing polymer construction handles repeated hits from airguns or firearms. Three sizes cover small rodent through coyote-sized practice at extended ranges.
Key Features:
Versatile Usage: Our targets are suitable for both day and night use, allowing you to practice anytime. Reactive targets add excitement and challenge to your shooting sessions, making them more engaging than traditional paper targets.
Quiet impact design: Target material absorbs impact sound, keeping nocturnal practice sessions as discreet as the shot itself
Multiple Sizes Available: Choose from three sizes to suit your needs:
Small (40mm width): These are a great test of skill, and are perfect practice for small rodents.
Medium (60mm width): Intermediate in size this target is analogous to animals like a raccoon.
Large (100mm width): Coyote sized, this largest target is great for practicing at extended ranges.
Easy Installation: Each target features a hanger hole designed for convenient mounting. The small and medium targets have a 6mm hole, suitable for fitting over a common framing nail, while the large target has a 15mm hole, designed to fit over a hardware store shepherd's hook.
Durable Construction: Made from a self-healing polymer, our targets can withstand hit after hit from airguns or firearms. To maximize target life, we recommend avoiding hollow point or wadcutter rounds.
Night hunting is a skill that needs practice, and practice needs targets. These give you a realistic analog to work with, day or night, without waking the neighborhood.
Pellets are precision components that stop performing like one the moment a skirt gets dinged. The Mega Caddie is the largest of our three-caddie lineup, built for shooters who want maximum pellet volume with maximum protection. Three interchangeable foam inserts scale from basic cushioning to individually cradled pellets, and a six-lug lid with a 30-degree throw keeps everything locked and accessible.
Key Features:
Ample Ammo Storage: The Mega Caddie offers increased capacity compared to regular and mini caddies, measuring a spacious 113x33mm (external dimensions) to accommodate more pellets for extended shooting sessions.
Secure and Fast: Six radial lugs securely attach the lid to the base, allowing for fast opening and closing with a short 30-degree throw. Textured sides ensure a firm grip for easy handling, while polished faces add style and durability.
Customizable Pellet Protection: Pellets are carefully protected with padding on the top, bottom, and sides. Interchangeable foam inserts allow you to customize the level of pellet protection to suit your needs. Three standard inserts are provided:
Ring: Offers basic protection with a simple ring around the perimeter wall of the caddie, ideal for cushioning pellets in full tins.
Penta Baffle: Features a baffled pellet insert with five sections, minimizing the distance a pellet can fall, and preventing damage as the tin empties. Allows for separate storage of multiple styles of pellets.
Individual Carrier: Provides maximum protection with caliber-specific inserts that hold pellets individually, virtually eliminating the risk of damage.
Customization Options: Custom colors and engraving are available upon request. Message us to inquire about personalized options.
If you're serious enough about your pellets to sort and store them carefully, you need a caddie built to the same standard. Individual Carrier inserts are included in .177, .22, .25, and .30 cal. Custom colors and engraving available on request.
Getting precise elevation adjustments out of a tripod is harder than it should be. Tripods are excellent at gross height adjustment but poor at fine-tuning, which means dialing in a perfect shot often ends in frustration. The Precision Stack Link solves this by inserting a continuously variable elevation adjuster between any two Arca or Picatinny interfaces. Mount it between your tripod head and a stock rest, a front bipod and a rail, or anywhere else you need controlled vertical spacing. Rotate the center section to raise or lower with precision; the tripod or bag handles the heavy lifting.
The design includes two tapered thrust bearings so the top clamp rotates freely from the rest of the unit. That means whatever is clamped on top stays oriented while you adjust elevation below, or while the tripod pans. A rifle on a stock rest won't rotate just because the platform beneath it does. The modular top and bottom interfaces accept Arca dovetails or Picatinny rails, and swap in the field. Mix and match configurations to suit whatever you're building.
Key Features:
Dual tapered thrust bearings: Top clamp rotates freely and independently from the adjustment mechanism and bottom interface; rifle orientation is preserved through elevation changes and panning
Continuously variable elevation: 40mm total height adjustment via center section rotation; knurled grip rings on the adjuster and lower collar for secure purchase during rotation
Modular rail interfaces: Bottom unscrews by hand; top swaps with a 3mm hex key and 4 bolts; Arca and Picatinny tops and bottoms available individually for mix-and-match configurations
Hex-actuated clamps: Both Arca dovetail and Picatinny rail clamps tighten with a 3mm hex key (not included)
Carbon fiber reinforced ABS top, bottom, and clamps: Rigid, lightweight, tough interface components; color-selectable center section in standard ABS
Metal-on-metal durability: Brass inserts at threaded interfaces for long-term durability
Specifications: 130g | 65mm collapsed | 105mm extended | 40mm diameter at widest point
The Precision Stack Link pairs naturally with our free Arca rest STL files, which are designed for 3D printing and mount directly to Arca tripod heads. If you're building a window or bench shooting setup around a tripod, that rest and this adjuster cover the elevation control problem end to end.
This offset Picatinny rail adapter clamps to your existing rail and positions a secondary Picatinny section adjacent to your scope for dual-eye operation. The ultra-low-profile clamp foot requires only 8mm of clearance above the rail, sliding underneath your existing scope to use otherwise wasted rail space. Two recoil lugs prevent movement under recoil. Available in standard (57mm) and long (75mm) offset to accommodate different scope sizes and interpupillary distances.
Key Features:
Lightweight construction: Weighs just 55 grams (standard) or 65 grams (long), including hardware
Universal compatibility: Accepts any picatinny-compatible accessory or optic
Dual-eye operation: Position accessories parallel to your primary optic for simultaneous use
Ultra-low profile: Only 8mm clearance needed above rail to fit under existing optics
Secure mounting: Two recoil lugs prevent sliding during recoil
Available configurations: standard (57mm) or long (75mm) offset for different scope sizes and interpupillary distances
Compact vertical offset: 20mm height (pic-to-pic height gain) keeps profile low while providing accessory clearance
Quick installation: Attaches to standard picatinny rail with 2.5mm hex key (hex key not included)
Durable materials: 20% carbon fiber reinforced polyamide with metal-on-metal threaded components
If you're running thermal or night vision alongside a primary optic, this is the most flexible way to do it. One adapter, any accessory, any configuration.
Rail space runs out fast once you start adding accessories. This scope-mounted Picatinny rail clamps to your scope tube and adds 120mm of standard Picatinny rail without touching your rifle's existing rail sections. Built from high-strength PPA with metal threaded inserts, it weighs 55 grams and fits most scopes with a hood diameter of 57mm or less. Particularly useful on rifles with canted scope mounts, where accessories need to stay aligned with the scope body rather than the rail.
Key Features:
Generous Rail Space: 120mm of picatinny rail provides ample room for mounting laser designators, IR illuminators, thermal imagers, rangefinders, and other essential accessories
Enhanced Construction: Built from high-strength PPA (polyphthalamide) with metal threaded inserts for superior rigidity and durability while maintaining minimal weight at just 55 grams
Advanced Illuminated Level Option: Available with integrated bubble level featuring removable glow-in-the-dark inserts that charge during daylight or can be upgraded with your own tritium vials* (3×15mm) for 10+ years of continuous illumination (additional information about inserts here)
Broad Compatibility: Works with most scopes featuring a hood diameter equal to or less than 57mm (virtually all scopes with 50mm objective lens or smaller)
Non-Marring Design: Polymer construction ensures your scope tube remains pristine
Precision Setup: Pairs perfectly with our Precision Wedge Level (sold separately) for complete rifle alignment system
Simple Installation: Quick and secure mounting using a 4mm hex key (not included); level version requires stub-length 4mm hex key
Custom Options: Special orders available for different tube diameters, objective diameters, and lengths
Available in standard or illuminated bubble level variant, with 1-inch, 30mm, and 34mm tube diameter options. If you need more mounting real estate without adding bulk, this is the direct solution.
Turret adjustments are only true if your scope is actually level relative to your rifle. The Precision Wedge Level uses the flat bottom of your scope and the top of your rail to create precise parallel alignment, with an integrated bubble level to set and confirm the position. Compatible with both flat top and Picatinny rails.
Key Features:
Precision-engineered from carbon fiber reinforced ABS for exceptional stiffness
Universal rail interface works with both flat top and Picatinny rails
V-groove alignment system ensures correct wedge-to-wedge positioning
130mm length provides stable, reliable leveling
Compatible with scopes having ~10-36mm clearance above rail (varies by application)
Available in two precision levels:
Standard: High-quality bubble level suitable for most applications
Machinist: Ultra-precise level for when maximum precision is required**
By ensuring your scope is perfectly squared and leveled on your rifle, you'll have confidence that your turret adjustments are true and your shots will land where intended. Pairs with our Illuminated Scope Level for a complete rifle alignment system.
Three custom glow dashi
LoX prototype 54,000,000 candela, ~6,000 lumens, 9 miles of throw. Seen here in a 30 second light-painting exposure illuminating the the house 0.25 miles away, the near mountain 1.6 miles away, and the far mountain 4.27 miles away.
2,600,000 Candela Lance of Ra illuminating a mountainside 1.61 miles away (world's most powerful production LED thrower)
Lume Inserts for knife lanyard holes.
The Falx is our mid-size standard moderator, carrying a dimensional envelope of 40x170mm and a weight of approximately 193 grams. It covers the full range of standard through high flow applications in a more compact package than the Sarissa, and for most rifles it is the natural starting point.
The design uses Nikola Tesla's Gas Diode to reflex propellant air back on itself, resisting forward flow through geometry alone with no moving parts. This three-stage approach first strips air off the pellet to reduce turbulence and improve accuracy, then delays it through compound gas diode stages, and finally passes it through a high-performance damping section to absorb residual sound energy. Critically, the design adapts along its length rather than repeating a single approach end to end, applying the right technique at the right point in the air's journey through the moderator.
The anodized aluminum tube is serviceable and modular. Cores can be swapped as the technology advances, meaning a Falx purchased today can be upgraded rather than replaced as new revisions become available.
Key Features:
Tesla Gas Diode design: Compound diode stages reflex and delay propellant air through geometry alone, no moving parts
Adaptive staged architecture: Design transitions along its length to maximize attenuation at each point in the air's travel
Tapered bore: Improves sound attenuation while reducing the likelihood of pellet clipping
Modular serviceable construction: Anodized aluminum tube allows core replacement as technology advances
Flow factor variants: Standard, Moderate, and High flow cores available to match your rifle's specific output
Big bore cores available: Expanded bore options accommodate larger caliber rifles up to High flow; space constraints preclude an Extra High flow variant at this size
Built and tested in the USA
Select the core whose flow factor most closely matches your rifle's calculated value. Information on calculating your rifle's flow factor can be found in our Moderator Configuration & Optimization guide.
This product is intended for airgun use only. Use of this product in any manner inconsistent with its design intent is a violation of federal law. More information about the federal court ruling which clarified the legality of airgun moderators in the United States can be found here. Local restrictions may still apply. It is the responsibility of the buyer to ensure compliance with all applicable laws.
This item ships within the United States only.