Grease Gunner
Well-known member
I was building a couple MP5’s and SD’s when I realized HK Parts failed to ship me the right parts for my order…..so I decided to start on a pet project I’ve been wanting to do….an HK53SD chambered in 300 BO….I think it’s coming together nicely.
I cut down an RCM 300 BO barrel to 7” and threaded it then started from there. Hopefully I can try it out this coming weekend along side an HK53 in 300 BO I’m building for a client….
I cut down an RCM 300 BO barrel to 7” and threaded it then started from there. Hopefully I can try it out this coming weekend along side an HK53 in 300 BO I’m building for a client….
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