RA-Tech ESD EVO II KWA LM4 Hop Up Housing for KSC/KWA M4 GBB

RA-Tech's ESD EVO II KWA LM4 Hop Up Housing for KSC/KWA M4 GBB. This CNC machined stainless steel hop up housing replaces the stock hop up housing with a high quality, extra-durable high performance version. Compatible with: KWA LM4 Series GBBR KSC System 7 2 GBBR