The Griffin Explorr 300 Utility Mount HUB is Griffin Armament’s tubeless .30 caliber suppressor with a HUB-threaded rear for interchangeable mounts (Griffin part no. GAEU3W). Griffin machines it from 17-4 stainless steel, H900 heat treats it and laser welds it for a light, durable body. The 1.375×24 HUB rear accepts Taper Mount, Dual-Lok, Gate-Lok, EZ-Lok, A2 and direct thread interfaces. ECO-FLOW baffles cut backpressure through semi-auto actions, and a low-profile flash suppressor is built into the end cap. It suits an owner who wants one .30 caliber can across several rifles.

Key Specifications

• Overall length is 6.3 inches, compact for a .30 caliber can.
• Weight is 9.7 ounces without an adapter, or 11.8 ounces with a PLAN-A Taper Mount HUB adapter.
• Diameter is 1.5 inches, the standard rifle-can size.
• Construction is 17-4 H900 stainless steel, CNC machined and laser welded in a tubeless design.
• The rear is a 1.375×24 HUB thread and is Taper Mount compatible through Griffin’s PLAN-A adapter.
• Griffin rates it for .30 caliber up to .300 Win Mag.
• Griffin lists sound reduction of 30.40 dB on a 16-inch MK1, and the suppressor is full-auto rated.

Frequently Asked Questions

What are the barrel length limits on an A2 mount? Griffin lists no minimum with a Taper Mount. On its A2 mount, Griffin specifies 16 inches for .308, 12.5 inches for 6.8 SPC, 8 inches for 7.62×39 and .300 Blackout, and 10.5 inches for 5.56mm.

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.

Buy the Griffin Armament Explorr .300 Utility Mount HUB Suppressor, 17-4 Stainless

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 backs it with its Perpetual Lifetime Warranty.