The RA Tech Steel Precision Inner Barrel is a 6.01mm Tightbore for the KWA LM4 PTR. Stainless steel construction provides durability and improved accuracy. These fit the new version KSC and the KWA LM4 gas blowback M4.
RA Tech Steel Tightbore Barrel for KWA LM4 Features:
-6.01mm Stainless Steel Construction
-Drop In Fit for LM4
-Ultra Smooth Precision Polish