Originally Posted by
austin12gauge
I can't tell you about the O-ring or the Spike's, but I can tell you that my CMMG got about 700 rounds of Federal #750 thru it on Sunday. I just cleaned it and my upper before writing this and I was surprised how clean both still were. Didn't seem much different to me than if I had been shooting 5.56.
Edited to add: And, oh yeah, not one failure to feed, chamber, fire or extract with the CMMG on Sunday.
I believe the O-rings are more to aid in the accuracy department, than to keep crud out of the receiver. One of the Ceiner weak parts is the rail, they break.
NFA Addict - Banned on Arfkom!
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