MRC1L1 MRC2 MRC5 MRCA MRCA MRCA MRCAS MRCAT MRCB MRCC MRCC-UNAM MRCCR ▼Complete English Grammar Rules is now available in paperback and eBook formats. Make it yours today! Advertisement. Bad banner? Please let us know Remove AdsFace
But even if we didn't allow that, this test would still pass the customary 1,000 MRBF (mean rounds between failures) that is applied in tests such as those conducted by the FBI. S&W's Sigma auto This equals 20 stoppages per 10,000 rounds, or 500 "mean rounds between failures" (MRB...