01-03-2014, 11:23 PM
NF, thanks I definetly don't want to torque a scope. Just slipping the handguard onto the upper things look good but "eye balling" it doesn't mean much. I like the looks of the ADM.
Walter, that's disappointing to hear to say the least. I bought the CMT upper based on it being machined on a 5 axis mill and was hoping that would mean "tighter" tolerances. Did you measure the upper vs barrel extension to see where the loose fit came from?
Did you loctite the barrel extension to upper fit after lapping the shoulder? Have you had a chance to check accuracy since?
Edit:
I just measured mine the barrel extension tunnel and got .996-.997 in 4+ areas, with a cheap caliper.
Walter, that's disappointing to hear to say the least. I bought the CMT upper based on it being machined on a 5 axis mill and was hoping that would mean "tighter" tolerances. Did you measure the upper vs barrel extension to see where the loose fit came from?
Did you loctite the barrel extension to upper fit after lapping the shoulder? Have you had a chance to check accuracy since?
Edit:
I just measured mine the barrel extension tunnel and got .996-.997 in 4+ areas, with a cheap caliper.