The SPIRO is a low back pressure gas gun suppressor that has excellent sound suppression levels at both the muzzle and at shooter’s ear. No longer do you have to compromise and have your gas gun suppressor be “Low back pressure but loud at the muzzle.”
People have been talking about “low back pressure” for a while, but there hasn’t been an objective method to actually quantify it. We weren’t satisfied with that, so went back to basic science and developed a way to directly measure back flow in a gas gun. We then used the same sound-test setup from the Silencer Summit to develop a very low back-pressure suppressor that is quiet at the muzzle and at the shooter’s ear position.
For full details, including comparative suppression data and the back pressure measurement “white paper”, please SPIRO WEB PAGE, but here are the highlights:
A dedicated 6mm version for 6ARC, etc, will be available to order a few weeks after SHOT Show. Additional gas gun cartridge-specific versions will be phased in throughout 2026. The introduction of the SPIRO does not affect the applicability of the Ultra and Magnus lines to bolt guns.
The SPIRO is in production now and is available to order now. Mile High Shooting and Allen Arms will have them start to be available a week or two after SHOT Show.
The SPIRO is made on a completely different production line than our Ultra and Magnus, so the production delays of either series will not necessarily affect the other. Product ETA’s will be different line to line. The current backlog for Ultra/Magnus/22TD cans is about 4-5 months.
DOMINUS “RETIRED”
With the introduction of the SPIRO, the DOMINUS line is being retired. For .223/5.56 gas guns, the 5.56 SPIRO is a better suppressor. The DOMINUS and DOMINUS-K models have direct replacements in the MAGNUS-S, and MAGNUS-K suppressors. Existing DOMINUS orders will be fulfilled.
