I have a blemished BCM upper, it is blemished but I believe is using my firearms so no biggy. Just a mark in the finish, like it rubbed up against something but it was not sharp and did not penetrate the finish.
I removed the buffer retaining spring and pin and installed a JP captured recoil spring assembly. My first use was a 2 gun match.. I know, should have tested it first but I didn't have the time. Anyway it ran great, I mean I couldn't believe how easy the carbine was to shoot follow-ups. Next time I go to the range I'll test for ejection pattern but unless that's totally out of whack it's a winner.
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