07-17-2021, 01:57 AM
My drawing reads 6.672 +- .005
A good test is to see if the rear of the bolt carrier pushes the buffer back as the upper is closed on the lower. If the front of a buffer is chewed up by the buffer retainer pin or the pin itself is bent or broken, it is a sign the buffer retainer pin hole was drilled improperly or a short bolt carrier...The buffer should not impact the buffer retainer pin until the upper is opened..
A good test is to see if the rear of the bolt carrier pushes the buffer back as the upper is closed on the lower. If the front of a buffer is chewed up by the buffer retainer pin or the pin itself is bent or broken, it is a sign the buffer retainer pin hole was drilled improperly or a short bolt carrier...The buffer should not impact the buffer retainer pin until the upper is opened..