09-18-2019, 11:18 PM
FLshooter Wrote:AR15 upper receiver lapping tools run $35 on Brownells.I lap all my upper receivers before barrel installation.I have never found one to be off.But,anything is possible.
Three out of four of mine have been off, one quite a bit. From various manufacturers. To me, lapping and bedding is just part of the build procedure.

