The Lees Precision KWA Fill Valve O-Ring Repair Kit is designed to fix fill valve issues with KSC and KWA GBB magazines. Inclues 4 silent fill valve o-rings, and 4 external fill valve o-rings. This will fix mags that leak while filling, or replace broken o-rings on a fill valve.
Lees Precision provides a number of upgrade parts for gas blowback airsoft guns. The LPE O-ring Repair Kits are ideal for fixing leaky GBB magazines and improving performance and reliability.