J P Enterprises 223/308 Tungsten Weight
J P Enterprises 223/308 Tungsten Weight, Designed to replace one or more of the existing weights of the JP Silent Captured Spring, these tungsten weights are heavier than the standard components to allow for more reciprocating mass in the operating system. Compatible with any Gen 1 JP Silent Captured Spring model. Mfg: J P Enterprises SPECS: Fits both .223 and .308 models.