The Faxon Harmonix Sentry .36 Cal Haynes 282 Rifle Suppressor is a hard-use can from Faxon Firearms rated for .36 caliber or less (Faxon part no. FF-SIL-R-3DPC-36-01). Faxon builds it from Haynes 282 superalloy, and it weighs 15.7 ounces without a mount. It measures 6.75 inches long and carries a high-temperature ceramic coating. The body is HUB mount compatible, and a 5/8×24 direct thread HUB adapter is packed in the box. Faxon describes it for 5.56, 300 BLK, .308 Winchester, 338 ARC, 8.6 BLK and 9mm PCC hosts, so one hard-use can covers several rifles.

Key Specifications

• The caliber rating is .36 caliber or less, as Faxon lists it for this model.
• Length is 6.75 inches, a compact body for the rating.
• Weight is 15.7 ounces with no mount fitted, the cost of a superalloy build.
• The material is Haynes 282 superalloy, a nickel-based alloy built for extreme heat.
• The finish is a high-temperature ceramic coating for heat and wear resistance.
• Maximum body diameter is 1.675 inches, with 1.5-inch wrench flats for installation.
• Faxon lists it as full-auto rated with no semi-auto barrel length restrictions.

Frequently Asked Questions

Which calibers can the Sentry .36 Cal run? Faxon rates it for .36 caliber and smaller and describes it for 5.56, 300 BLK, .308 Winchester, 338 ARC, 8.6 BLK and 9mm PCC hosts.

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.

How much sound does it cut? Faxon reports up to 25.8 dB on a 10.5-inch 9mm PCC with no booster and 25.2 dB on a 12.5-inch 338 ARC subsonic, direct thread, measured 1 meter left of the muzzle.

Buy the Faxon Harmonix Sentry .36 Cal Haynes 282 Rifle Suppressor

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 Faxon Firearms‘s silencers and suppressed firearms lineup and our Lubbock, Texas team will handle the transfer, and it ships fast to your Class 3 dealer.