03-21-2014, 03:34 AM
I have the Mega billet SBU upper, matching billet lower and am using a JP stainless full auto, full weight carrier. I want the roller for the reduced wear on the cam channel in my upper. I know with a standard cam pin there is an initial wear pattern created upon first break in and that it normally stops or slows way down from there. I got a real good deal on the roller kit. I am a little anal sometimes about things being just right and just don't want the wear when it can be prevented. I am even having my upper NiB-X coated by WMD. Just like the idea of the reduced friction and wear.