PWS 1/2X28 PISTON BLK

Description

The Primary Weapons Systems 1/2×28 piston is a replacement and service component for booster-equipped pistol suppressors that mount on threaded handgun barrels. When a suppressor is attached to a semi-automatic pistol with a tilting or rotating barrel, the barrel needs to move rearward slightly during the firing cycle to unlock and allow the slide to travel. A fixed suppressor would prevent that movement, causing the action to short-cycle or fail to function altogether. The booster piston solves this by acting as the interface between the suppressor and the barrel threads, allowing the suppressor body to move independently of the piston during cycling so the firearm continues to operate normally.

The 1/2×28 thread pattern is the standard pitch for most 9mm-class threaded pistol barrels produced in the United States, making this piston broadly compatible with that category of host firearm. Pistons are wear and contact items — they absorb the repeated impact of the booster spring and suppressor body cycling against the barrel, so having a correctly fitted replacement on hand matters for long-term reliability. This piston is manufactured by Primary Weapons Systems, a company with an established background in precision suppressor components, and is finished in black. If you are assembling or servicing a booster system, confirm that the piston geometry and thread pitch match your specific suppressor housing before ordering, as booster designs vary across manufacturers.