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  1. HK Customer Service
    I got this gun new a week ago. I did a light clean and lube before taking it to range for first time yesterday. Used both mags that came with the new gun. Shot Blazer Brass FMJ (115 gr, I think-- can check). Had two problems multiple times within the first 150 rounds: 1) rounds jammed down deep...
    Hey guys i'm looking for detailed blueprints/specs for a HK21 build, mainly the feed mech blueprints (those blueprints alone are fine too) if someone can point me in the right direction. It would be highly appreciated i've been searching for these awhile now and no luck. Please help me out here...
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