Copper ? Seriously ? Are you shooting some old Russian ammo or something ? It's from whatever metal your cases are made from. When the RSA settles in it will probably go away .
Brass marks near ejection port.
Sorry, if this sounds stupid. I have shot many pistols through my life and I recently became a first time HK owner. After shooting 200rds through my USP I noticed all brass marks near the ejection port. I have never seen this happen with any other pistol I have shot. Is this normal?
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1 - 1 of 11 Posts
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