The Griffin Armament HUB HRT-556 AM is a full-size, ultra low backpressure 5.56mm suppressor built for hard use with strong sound and flash reduction. It is printed from Nickel 625X alloy with SLM additive manufacturing and uses a 17-4 H900 stainless steel rear.
The industry-standard HUB 1.375×24 threaded rear lets you pick the mount: Griffin HUB mount adapters or other makers’ inserts. It ships without a muzzle device or HUB mount. Griffin lists -36.6dB (131.0 dB on a 12.5″ MK2 5.56mm) and 1.568″ from the rear of the HUB interface to the blast baffle. Not user serviceable.
Specifications
- Brand: Griffin Armament
- UPC: 6314659772959
- Caliber: 5.56mm
- Mount: HUB 1.375×24, mount not included
- Material: Nickel 625X, 17-4 H900 stainless steel
- Color: Black
- Sound Rating: -36.6dB (131.0 dB on 12.5″ MK2 5.56mm)
- Blast Baffle Distance: 1.568″
- User Serviceable: No
Ships to a licensed FFL dealer for transfer. The buyer must pass the required background check and meet all federal, state and local laws.







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