Put a new pistol together this weekend. Everything function checked fine. Went to the range today and after about 2 mags the bolt catch became hard to press. If you break the gun open it operates fine but when the bolt is holding pressure on it it’s pretty stiff. Without a doubt the stiffest one I’ve ever used. Any ideas on what to check? I lubed it up and it still is tough. I can do it with my thumb but is much tougher than all my others.
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