RA-Tech have sent over details of their Marui HK 45 CNC steel outer barrel:
RA-TECH Marui HK.45 CNC Steel Outer barrel 14mm CCW
Link to the product: http://goo.gl/ZvBRb2
(RA-Tech)
RA-TECH Marui HK.45 CNC steel outer barrel 14mm CCW
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