The Griffin Explorr 300 EU3 HUB suppressor is a tubeless .30 caliber Utility Mount model with a 1.375×24 HUB rear (Griffin part no. GAEU3W). Griffin machines the body from 17-4 stainless steel, heat treats it to H900 and laser welds it for a light, durable can. The Utility Mount lets it run Griffin’s Taper Mount system out of the box and change over to other 1.375×24 style mounts later. It suits an owner who wants one .30 caliber suppressor to move across several rifles.

Key Specifications

• Griffin rates it for .30 caliber up to .300 Win Mag, covering hunting and tactical rifles.
• Diameter is 1.5 inches, a 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, which accepts mount systems built around that standard.
• It is compatible with Griffin’s Taper Mount system through the Utility Mount.
• It is full-auto rated, built for hard use on semi-automatic rifles.

Frequently Asked Questions

Can I use mounts other than Taper Mount? Yes. The 1.375×24 HUB rear takes other mounts built to that standard, so you can change the interface without replacing the suppressor.

What cartridges is it rated for? Griffin rates the Explorr 300 for .30 caliber up to .300 Win Mag.

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 EU3 Utility Mount HUB Suppressor, .30 Cal, 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.