It is Pappabears carrier. I probably staked it for him.
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Really the only part that benefits from chroming is the bolt. The inside of the carrier is (or should be) already chromed. I figure every major modern military weapon has it's piston chromed. The bolt is the "piston" in a DI gun and the inside of the carrier is the chamber. Therefore I have the bolt chromed and all is good!
The main reason for it (to me) is ease of cleaning and actually being able to see if the crud is gone. Yes, I am of the "clean AR" crowd; just running a Boresnake and dumping in more lube ain't my cup of tea. YMMV
Makes me wonder where Kevin got my Young N/M BCG a couple of years ago, when he built my SPR... :confused:
My SPR was the LAST rifle built by Johnson Tactical Rifles here in Pittsburgh (early August of 2011), before he gave up professional smitty'ing for a paying job in Seattle. He might well have done it himself! Or got it through Ranier. But it IS staked.
After reviewing the facts, I think that the Mil-Spec BCG is the way to go. Every PiP I have read about has shown this to be the case over LMT enhanced bolts, NiB, A100 alloys, etc. etc. etc.
The Mil-Spec BCG just outperforms it ALL AROUND. May be harder to clean, etc. if you're into white-glove, but...it runs. More reliably.