The B&T Stille 300 suppressor is a .30 caliber hybrid can tuned for bolt-action rifles and precision gas guns (B&T part no. SD-145894). B&T optimized it around .300 Blackout hosts but rates it for multiple calibers up to .300 Winchester Magnum. A 3D-printed titanium body keeps weight at 13.7 ounces, while a 718 Inconel blast insert protects the high-stress area from erosion. The sealed design is built for strong sound performance with both supersonic and subsonic ammunition. It ships with a 5/8×24 direct-thread adapter and accepts any standard HUB mount.

Key Specifications

• The bore size is .30 caliber, covering the common precision and hunting cartridges.
• The caliber rating runs from .223 up to .300 Win Mag, so one can serves several rifles.
• Weight is 13.7 ounces, light for a hybrid rifle suppressor.
• Overall length is 8.5 inches, a compact size for a bolt gun.
• Diameter is 1.7 inches, which clears most rifle handguards and scopes.
• Construction is 3D-printed titanium with a 718 Inconel blast insert, for low weight and long service life.
• The finish is black Type 2 anodized, a hard, low-glare surface.
• It ships with a 5/8×24 direct-thread adapter, the common .30 caliber muzzle thread.
• The mount interface is 1.375×24 HUB compatible, so other HUB mounts drop in.
• The design is sealed and weldless, built for super and subsonic ammunition with no welded weak points.

Frequently Asked Questions

What cartridges is it rated for? B&T rates the Stille 300 from .223 up to .300 Win Mag, with the design optimized around .300 Blackout.

Is there a barrel length limit? B&T lists no barrel length restrictions. It is optimized for 14.5-inch and longer barrels and rated to run on shorter ones.

Do I need ATF approval to buy this? No. As of October 9, 2026, ATF no longer requires Form 4 approval, registration or a tax stamp for suppressors. It transfers on a Form 4473 with a background check through a Class 3 (SOT) dealer. State and local laws still apply.

Buy the B&T Stille 300 Suppressor, .30 Caliber, Black Ti/Inconel

As of October 9, 2026, this suppressor transfers on a Form 4473 with a background check at your Class 3 (SOT) dealer, with no Form 4 or tax stamp; state and local laws still apply. Order through B&T‘s silencers and suppressed firearms lineup and our Lubbock, Texas team will handle the transfer.