Faxon FirearmsHARMONIX Sentry .30 Cal
.30 Cal / 7.62mm suppressor · HUB 1.375x24 interface · specs and compatibility from the manufacturer
Notable features
- HUB Compatible
- No Barrel Restrictions
- Haynes 282
- Full-Auto Rated
length
6.75″
weight
15.7oz
MSRP
$1,099
length
6.75″
weight
15.7oz
calibers
5.56–.30
material
Haynes 282
interface
HUB 1.375x24
MSRP
$1,099
- Overall length
- 6.75″
- Diameter
- 1.68″
- Weight
- 15.7 oz
- Material
- Haynes 282 Superalloy
- Max caliber
- .30 Cal / 7.62mm
- Base interface
- HUB 1.375x24
- Front cap
- Fixed
- Full-auto rated
- Yes
- Barrel restriction
- None (manufacturer stated)
- MSRP
- $1,099
Prices are manufacturer's suggested retail (MSRP). What you pay may differ.
- Base interface
- HUB 1.375x24
- Front cap
- Fixed
The HUB 1.375x24 is an open standard: 415 mounts and 818 muzzle devices in our catalog fit this suppressor, including Faxon Firearms Direct Thread HUB Adapter (1/2x28), AAC 51T S.T.A.M.P. Mount and AB Suppressor AB Raptor Adapter. You aren't locked into one manufacturer's parts.
Which ones fit your barrel and host?
Check in the BuilderManufacturer claim
- At the 2025 Thunderbeast Silencer Summit — testing independently conducted by Thunder Beast Arms — the HARMONIX ranked #1 of 22 suppressors at the Shooter's Ear in 9mm in both dB and peak pressure and #2 in dB(A); in 5.56 it placed #5 of 86 at Muzzle Right. All tiers share the same baffle geometry, so the sound results apply across the line.
- Uses the Faxon HUB mount interface and ships with a Direct Thread HUB Adapter (1/2x28 for 5.56, 5/8x24 for .30 and .36 Cal); pair with a MuzzLok Plan B compatible muzzle device for quick-detach.
- 6.75″ long and 1.675″ max diameter; full-auto rated across all calibers with no minimum barrel length restriction on semi-auto or bolt-action hosts.
- Made in the USA by Faxon Firearms, an ISO 9001:2015 certified manufacturer headquartered in Greater Cincinnati, OH.
Show all 9 ▾ ▴
- Every component of the Sentry — body, baffles, and end cap — is 3D-printed Haynes 282 nickel superalloy, the most durable tier at 15.7 oz.
- The all-Haynes-282 Sentry ($1,099) is built for belt-fed platforms, sustained automatic fire, and magnum cartridges at institutional round counts where absolute longevity matters more than weight.
- The .30 Cal bore covers the most popular rifle cartridges — .300 Win Mag, .308 Win, 6.5 Creedmoor, .300 BLK, 5.56, 6mm ARC, and 6.5 Grendel — for multi-caliber and precision rifle use.
- Ships with a 5/8x24 Direct Thread HUB Adapter.
- A larger bore can safely suppress smaller calibers (a .30 Cal bore also suppresses 5.56), but a suppressor must never be used on a cartridge larger than its bore.