I had a Mk13 built for me from the AICS chasis. This one: http://www.eurooptic.com/accuracy-i...d-forend-rail-full-us-navy-spec-mk-13-ch.aspx
When I look for additional magazines, what I am looking for, and who makes them: AI, Magpul, etc. ?
When I look for additional magazines, what I am looking for, and who makes them: AI, Magpul, etc. ?