*The thread pitch engraving on these 1/2×28 Internal Shoulder Pistons were engraved higher than normal. Aside from the engraving location, these pistons are in perfect condition.
The 1/2×28 Internal Shoulder Piston is not compatible with standard 1/2×28 threaded barrels. It’s specifically designed for the Glock 43 and Sig P938.
Our piston uses a non-slotted design creating a full circumference gas seal. This drastically lowers gas blowback for a more enjoyable shooting experience. Machined from 17-4 Stainless Steel and heat treated this piston is built to last.
Pistons are generally used with a booster system on handguns. When using a piston on a fixed barrel platform such as a carbine or subgun the spring must be replaced with a Fixed Barrel Spacer. For information on what mounts/accessories should be used with your host firearms check out our Pistol Suppressor Attachments Guide!