The Griffin Dual-Lok PSR 5 FDE is an over-the-barrel 5.56mm suppressor from Griffin Armament, finished in flat dark earth (Griffin part no. GADLPSR556FDE-W). Because the can slides back over the barrel, its 8.4-inch body adds far less length to the rifle than a conventional muzzle-mounted suppressor. Griffin revived the concept from its earlier RSTA and SPR models using newer laser welding and its ECO-FLOW baffle system, which reduces blowback. The OTB Dual-Lok mount locks up on a taper interface for accuracy and minimal point of impact shift. It is aimed at precision 5.56 rifles where overall length and accuracy both matter.

Key Specifications

• Overall length is 8.4 inches, much of which sits over the barrel rather than past the muzzle.
• Weight is 14.9 ounces, light for a precision rifle suppressor.
• Construction is 17-4 H900 stainless steel and 718 Inconel, a pairing suited to the heat of rifle fire.
• The mount is OTB Dual-Lok, an over-the-barrel taper lock with 120 effective positions.
• Griffin lists sound reduction of 34.98 dB, measured at 132.5 dB on a 16-inch MK1 rifle.
• A PSR Dual-Lok 2-port muzzle brake in 1/2×28 is included for mounting.
• The FDE finish is PVD coated and Cerakoted over the heat-treated body, and the can is full-auto rated.

Frequently Asked Questions

What does my barrel need to fit the PSR 5? Griffin states that the 1.95 inches of barrel behind the thread shoulder must be .775 inch outside diameter or smaller for the over-the-barrel body to clear and interface correctly.

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.

Which muzzle devices does the PSR 5 use? It mounts on PSR Dual-Lok devices only: the PSR Dual-Lok Paladin 2-port brake and the PSR Dual-Lok flash hider. Standard Dual-Lok muzzle devices do not fit the over-the-barrel mount.

Buy the Griffin Armament Dual-Lok PSR 5 Suppressor, 5.56mm, FDE

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 Griffin Armament‘s silencers and suppressors lineup and our Lubbock, Texas team will handle the transfer, and it ships fast to your Class 3 dealer. Griffin covers it with its Perpetual Lifetime Warranty.