Description
The HRT-556 AM Silencer is a highly durable, true low backpressure .22cal (5.56mm) suppressor constructed from Griffin’s proprietary Nickel 625X™ powder alloy utilizing state-of-the-art DMLS additive manufacturing technology. This is the first major evolution to the DUAL-LOK® family of suppressors which were historically assembled from traditionally-manufactured components. This new manufacturing process yields a solid piece of metal, resulting in unparalleled strength and creation of advanced gas channeling pathways to significantly reduce system backpressure over previous generations.
These silencers are built on Griffin’s rock-solid DUAL-LOK® mounting system which has become one of the most trusted active-locking mounting systems preferred by law enforcement and military professionals. This advanced mount provides exceptional accuracy with minimal and repeatable POI shift, and completely eliminates the fear of unintended loosening during prolonged courses of fire.
The proprietary, patent-pending Nickel 625X™ alloy showed in testing a ~68% increase in yield and tensile strength over INCONEL® 625, a commonly used suppressor alloy. The completely redesigned flash hider end cap reduces system backpressure by venting gases ahead of the projectile, resulting in softer recoil impulses, less wear and tear on the host firearm, and reduces operator exposure to toxic gases.
Features
- Integrated DUAL-LOK® Mounting System
- Low Backpressure Baffle Stack
- Additive Manufacturing
- Ultra-Durable Nickel 625X™ Alloy Construction
- Printed Core Laser-Welded to Machined Rear for Warranty Serviceability
- Low Backpressure Flash Hider End Cap
- Highly Accurate with Minimal POI Shift
- Perpetual Lifetime Warranty™
What’s in the Box
- DUAL-LOK® HRT-556™ AM Silencer (.22cal)
- DUAL-LOK® EZ-Brake™ Muzzle Device (1/2×28 – .22cal)
- Branded Griffin Silencer Pouch
AVAILABLE MAINTENANCE ITEMS:
- DUAL-LOK® Wrench
- Griffin GI Armorers Wrench
- Mount Adapter Driver
- Cleaning Brushes
- ST-3 Thread Sealant
- High Temp 2300 degree Anti Seize
- Alignment Rods (to verify proper installation)
Digital Manual
- CLICK HERE FOR MANUAL
Ratings & Restrictions
- DUAL-LOK® Suppressors do not have minimum barrel length restrictions or constraints for rifle calibers. While longer barrels promote longer service life, there are no barrel length restrictions with this suppressor!
INCONEL® is a registered trademark of Special Metals Corporation. Griffin Armament has no affiliation with Special Metals Corporation, and the use of “INCONEL®” is in this document is only for purposes of comparison between materials.







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