Griffin Armament Piston Barrel Adapter .578x28 – Universal Suppressor Mounting

The Griffin Armament Piston Barrel Adapter allows you to mount Griffin pistons and compatible suppressor systems to barrels threaded in .578x28 TPI. This adapter acts as the critical interface between your threaded barrel and a booster/piston assembly, enabling reliable suppressed fire on tilting-barrel pistols where the suppressor must decouple during the action cycle. Common on older or imported pistols with metric threading, this pitch requires a dedicated adapter to run modern suppressor systems.

Machined from heat-treated steel with a durable black nitride finish, the adapter installs onto the barrel's existing threads and provides a secure mounting platform for Griffin pistons. Once installed, the piston threads onto the adapter and the suppressor attaches to the piston, maintaining proper alignment and function. Verify your barrel's thread pitch before ordering—.578x28 is distinct from more common pitches like 1/2x28 or M13.5x1 LH.

• Type: Piston barrel adapter
• Thread Pitch: .578x28 TPI
• Material: Heat-treated steel
• Finish: Black nitride
• Compatible With: Griffin Armament pistons and compatible suppressor systems
• Use: Tilting-barrel pistols with .578x28 threaded barrels