Originally Posted by
Jaydam
I'm about to break-in my new XCR-L (buffer is on lower not on BCG, 2013 model) and read up on the break-in procedure.
1) Does it matter if I use Norinco 5.56NATO for the break-in? I have M855 and M193 and AE55gr and others, but would prefer to use up this stuff first.
2) Gas setting #4 during break in, I read this gas setting is incredibly hard on the receiver parts, especially the recoil buffer. While I only found one occurrence of the recoil buffer getting chewed, should I let it get chewed until it flings empty cases 10 feet or more on gas setting 1? Obviously stop using if it is chewed, which I intend to keep an eye on during this period.
3) I read I can improve and speed-up the break-in procedure by polishing (I have some arkansas stones) the bottom of the carrier that rubs the top round of the mag before feeding that round. Will this void our warranty?
4) Can we order 1 spare recoil buffer alone or do we have to order the parts kit?
5) Any other tips or suggestions for new XCR-L owners?