08-21-2020, 03:06 AM
got it. an hour in the deep freeze (aluminum has a higher TCE than steel, so should shrink faster than the steel) and it loosened right up. forgot how cold -40F is. made my hands hurt just carrying it from the freezer to the bench vise. barrel nut still round. handguard slides right on the barrel nut, no problem.
i'll let everthing defrost under a fan tonight and this weekend lap the upper receiver face.
thanks for your support guys. not sure why BCA put that nut on so frickin tight. but browsing the web it looks like lots of manufacturers do that.
whew.
now on to the next steps
-tdbru
i'll let everthing defrost under a fan tonight and this weekend lap the upper receiver face.
thanks for your support guys. not sure why BCA put that nut on so frickin tight. but browsing the web it looks like lots of manufacturers do that.
whew.
now on to the next steps
-tdbru