The Griffin Dual-Lok PSR 7 Black is Griffin Armament’s .30 caliber over-the-barrel suppressor in a nitrided black finish (Griffin part no. GADLPSR762W). It sleeves back over the barrel so the rifle grows far less than an 8.9-inch can would normally add. Griffin pairs its ECO-FLOW baffle system with a patent-pending pressure reduction cap that integrates a flash hider. The OTB Dual-Lok mount uses a taper lock, an ACME thread and a locking ring with 3 anti-rotation teeth, with no consumable parts. It suits a .308 precision rifle or a semi-auto 7.62 build where overall length counts.

Key Specifications

• Overall length is 8.9 inches, and the over-the-barrel design means much of it sits behind the muzzle.
• Weight is 15.8 ounces, light for a .30 caliber precision suppressor.
• Construction is 17-4 H900 stainless steel and 718 Inconel in a laser-welded, tubeless body.
• The mount is OTB Dual-Lok, a taper lock interface with 120 effective positions.
• Griffin lists sound reduction of 35.60 dB on a 16-inch LMT MWS and 37.25 dB on a 25-inch M40A5.
• A PSR Dual-Lok Paladin 2-port brake in 5/8×24 is included for .30 caliber barrels.
• The finish is nitrided black, a hard, corrosion-resistant surface treatment, and the suppressor is full-auto rated.

Frequently Asked Questions

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.

Will the PSR 7 fit my .308 barrel? 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.

Can I use regular Dual-Lok muzzle devices with it? No. The PSR 7 takes the PSR Dual-Lok devices, the Paladin 2-port brake and the PSR flash hider, because its mount sits over the barrel.

Buy the Griffin Armament Dual-Lok PSR 7 Suppressor, .30 Cal, Black

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. It carries Griffin’s Perpetual Lifetime Warranty.