The BOSS Guillotine (brand part no. GU-15060-556-SS-12-SE-BLK) is a duty-rated 5.56 suppressor built with a stainless nitrided core and a standard end cap. BOSS Suppressors designs the Guillotine for non-gas-blowback actions like bolt guns and piston systems. The Guillotine favors shooters running non-direct-impingement platforms who want a duty-grade can.

Key Specifications

• Rated for 5.56 caliber ammunition.
• Threaded 1/2-28.
• Built with a stainless nitrided core.
• Finished with a standard end cap.
• Built for non-gas blowback actions (bolt guns, pistons).

Frequently Asked Questions

Is this an NFA item? Yes. As a suppressor, it’s a Title II firearm requiring an approved ATF Form 4 and transfer through an NFA-licensed dealer.

What actions is it built for? Non-gas blowback actions such as bolt guns and piston systems.

How does it mount? It mounts via direct thread (1/2-28), not a quick-detach mount.

Buy the BOSS Guillotine Suppressor

This is a Title II item regulated under the National Firearms Act. Purchase requires an approved ATF Form 4, no federal transfer tax, and transfer through a licensed NFA (SOT/Class 3) dealer, with an extended federal approval wait before delivery. Order through BOSS Suppressors‘s silencers and suppressed firearms lineup and our Lubbock, Texas team will walk you through the transfer process.