I don't see anything wrong with a polymer cover. For the simple job it does, cover the port and pop open when the bolt is cycled, I can't see that polymer wouldn't do as good a job as metal, especially on a piston gun.
1 - 1 of 1 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
HKPRO Forums
A forum dedicated to and laser-focused on Heckler & Koch firearms, Heckler & Koch accessories and the owners and enthusiasts that love them! Come join the discussion regarding HK pistols, long arms, NFA arms, HK accessories, HK history and trivia and more.