Air
Accipiter
Accipiter
There is a saying: the last 5% takes as much work as the first 95%. The Accipiter line of moderators is meant to carry that last 5%. The Accipiter line of moderators carry the same dimensional envelopes of our Falx (40x170mm, 115 grams Standard Flow, 107 grams Moderate Flow) and Sarissa (40x255mm, 172 grams Standard Flow, 155 grams Moderate Flow) and share the same proven principles of air stripping, flow delaying, and sound absorption. That said, few if any parts are shared between the standard line and these. Every single aspect has been analyzed, adapted, and subtly modified to maximize performance and minimize weight.
What is so special about the Accipiter line specifically? A thinner lighter anodized aluminum tube maintains the advantages of serviceability/modularity, while reducing weight. Caps are in POM/delrin (polymer) or composite to shave additional weight. Cores are tweaked for lightness without sacrificing sound attenuation, and use a new ultra-light composite, cutting their mass by more than 50%. Modifications have been made to the damping section as well. Finally our falling feather logo, exclusive to the Accipiter line, highlights that this is not one of our ordinary moderators. Taken together, we’ve managed to reduce the weight by over 1/3rd while maintaining or improving acoustic performance over the base line.
The basic premise of the design is to use Nikola Tesla’s Gas Diode to reflex air back on itself and stop forward flow in the moderator. The moderator uses a three stage system. First the air is stripped off the pellet, reducing turbulence and improving accuracy. Second it is delayed via compound gas diodes. Finally a damping system muffles the sound. Most moderator designs focus on one of two capabilities, either sound wave damping or flow delaying, and this is copied the entire length of the moderator. Why though should the sound and flow at the back of the moderator be the same as at the front? It didn't make sense to us either, thus the design adapts along its length to maximize sound attenuation at a given flow level while minimizing size and weight.
Please note, while we try to keep core variants in stock for immediate shipment, some may be built to order, a process which takes two weeks. While all designs are considered experimental, these are especially so.
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.
This item will only be shipped within United States.
Which version is right for me?
It would be absurd to think one moderator design would produce optimized sound attenuation for all rifles, peak performance is achieved by tuning moderators to their hosts. We call the metric for this air and sound served to the moderator, by the host, “Flow Factor.” The information necessary to calculate the flow factor of your host rifle can be found here. Select the moderator with a flow factor which most closely matches your own application, in order to maximize effective sound attenuation and ensure safe operation. Custom bores are available on request, please message us first. All designs are considered experimental.
Standard - Tuned on an FX Crown with a flow factor of 460. Factory configuration w/ extended shroud peak is 288.0
Moderate - Tuned on an FX Crown with a flow factor of 1,111. Factory configuration w/ extended shroud peak is 637.6
High - Tuned on an FX Dreamline with a flow factor of 6,500. Bare muzzle configuration (un-moderated) peak is 3,668.4
Sarissa trace, standard flow rev.1.2, as tested on a shrouded FX Crown .22. Average peak is 37.5. (note traces not to scale)
Simply adding length and stretching the third stage was insufficient to give the Sarissa “enough” of a performance advantage over the already very quiet Falx. A wide variety of 4th stages were developed and tested. Finally, a new damping section was developed, allowing this incredible performance, both in peak and post-peak sound, the muzzle report is about as loud as the hammer slap on the .30 caliber Crown below. This is the quietest airgun shot we’ve ever measured. Period.
Sarissa trace, moderate flow rev.2, as tested on a shrouded FX Crown .30. Average peak is 64.75. (note traces not to scale)
The Sarissa takes our proven concepts, but unleashes them from the size constraints of the Falx. The result was a surprising performance gain. These are the quietest measurements we’ve ever taken at this flow factor by a comfortable margin. Not only is the peak substantially lower, the post-peak-sound has improved significantly as well. The results are quiet enough to be confused with a much less powerful air rifle.
Sarissa trace, high flow rev.2, as tested on an unshrouded FX Dreamline .30. Average peak is 107.8.
This is the power (flow factor) range where size really starts to matter. The Sarissa high flow doesn’t need any qualifiers like “it does an admirable job for its size,” it just does a amazing job flat out. This goes for both cutting the peak and preventing a great deal of post-peak-sound from the air tirading through the diodes.