KWA OEM Repair Parts are specifically designed for precision fit and finish in KWA GBB LM4 Rifles and Magazines. Keep your rifle performing like the day you bought it with KWA OEM parts.
The KWA LM4 Piston is Part 2, and fits where the AR15 bolt would be in the bolt carrier. KWA's LM4 piston functions as a blowback chamber, and is tipped with a metal reinforced nozzle for durability. This KWA OEM part fits all US versions of the LM4 PTR.
KWA LM4 Piston Part 2 Features:
-Metal Reinforced Construction
-Precision Fit and Finish
-Guaranteed KWA LM4 Compatibility