The Brevitas II is our smallest moderator, coming in at 28x70mm and under 25 grams. For reference, that's roughly the size of a fat tube of chapstick. These are not typos. At this size, the design goal was never whisper-quiet performance; it was to produce the most effective sound attenuation physically possible in a package that disappears onto the end of a shrouded rifle.

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. Three compact gas diode stages are packed into the available length. There is no room for a damping section at this size, which means the Brevitas II will produce a noticeable whoosh on firing. That's not a flaw; it's a honest consequence of the form factor. What it will do is meaningfully attenuate the sharp peak of the muzzle report, blending into the shroud profile of a well-shrouded rifle for a nearly unmoderated look and feel. If you need more attenuation than that, you need a larger moderator.

The Brevitas II is the successor to the original Brevitas, which was produced in limited numbers before manufacturing constraints forced a pause. The successor solves those manufacturing issues while improving on the original's acoustic performance, somehow squeezing more out of an already extremely constrained form factor.

Key Features:

• Tesla Gas Diode design: Three compact diode stages reflex and delay propellant air through geometry alone, no moving parts

• Extreme compact form factor: 28x70mm, under 25 grams; designed to blend into the shroud profile of a shrouded rifle

• Shroud-dependent design: Intended for use on already-shrouded rifles; without effective reflex volume ahead of the moderator this design cannot perform optimally

• .30 caliber bore fits all standard smallbore airguns: Testing showed no performance improvement from smaller bores, so these ship bored for .30 cal and run cleanly from .177 through .30

• Built and tested in the USA

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.