The B&T Stille 8.6 suppressor is a .338 caliber hybrid can purpose-built for modern bolt-action rifles that also runs on gas guns (B&T part no. SD-145821). It carries a multi-caliber rating up to .338 Lapua Magnum, so one can covers everything from a .223 trainer to a magnum precision rifle. The body is 3D-printed titanium, and a 718 Inconel blast insert and blast baffle resist the erosion that big magnum charges cause. A sealed design targets strong sound performance with both supersonic and subsonic loads. It ships with a 5/8×24 direct-thread adapter and wears a distinctive topographic exterior pattern.

Key Specifications

• The bore size is .338 caliber, sized for the big magnum precision cartridges.
• The caliber rating runs from .223 to .338 Lapua Magnum, so it moves between small and large rifles.
• Weight is 13.7 ounces, light for a magnum-rated can.
• Diameter is 1.75 inches, a size that suits heavy rifle barrels.
• Construction is 3D-printed titanium with a 718 Inconel blast insert and baffle, for weight savings and erosion resistance.
• The finish is black Type 2 anodized with a topographic exterior pattern.
• It ships with a 5/8×24 direct-thread adapter for immediate use.
• The interface is 1.375×24 HUB compatible, so you can move to another HUB mount later.
• The design is sealed, engineered for both supersonic and subsonic ammunition.
• Construction is weldless, which removes traditional welded weak points.

Frequently Asked Questions

What cartridges is the Stille 8.6 rated for? B&T lists a rating from .223 up to .338 Lapua Magnum.

How does it mount? It ships with a 5/8×24 direct-thread adapter, and the body accepts standard 1.375×24 HUB mounts.

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 8.6 Suppressor, .338 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, and it ships fast to your Class 3 dealer.