The Rearden Alpha Atlas in the Heat Treat finish is a mount that gives suppressors with 1.125-28 inside-diameter threading a Plan B style interface. Rearden lists it for cans such as the Rugged Obsidian 9 and Obsidian 45, and advises against it on suppressors that use low-profile style adapters like the Omega 9k. It adds only 0.350 inch of length, which keeps the overall setup short. The mount is machined from 17-4 PH H900 stainless steel and weighs 1.22 ounces.

Key Specifications

• The thread is 1.125-28, the SilencerCo Alpha thread pitch, so it fits suppressors with that inside-diameter thread.
• The material is 17-4 PH H900 stainless steel, a precipitation-hardened steel suited to a small, heavily loaded part.
• The finish is heat treat, one of the finishes Rearden offers on this mount.
• It adds 0.350 inch of length, which keeps the added bulk to a minimum.
• It weighs 1.22 ounces, so it barely changes the weight of the setup.

Frequently Asked Questions

Which suppressors does the Alpha Atlas fit? It provides a mount interface for suppressors with 1.125-28 inside-diameter threading, such as the Rugged Obsidian 9 and Obsidian 45. Rearden does not recommend it on suppressors that use low-profile style adapters, like the Omega 9k.

Which muzzle devices work with it? Rearden lists compatibility with its short muzzle devices (FHD, Mini, SPB, RPB and R2S), the Q Cherry Bomb and other Plan B compatible muzzle devices.

Buy the Rearden Alpha Atlas Suppressor Mount, 1.125-28, Heat Treat

If you want an Obsidian-style can on a Plan B muzzle device, this adapter is the link between the two. Order it from our Lubbock, Texas gun shop for fast direct shipping, and see more Class 3 parts and accessories.