12-13-2013, 05:37 AM
Do not use a torch on a heat-treated aluminum or steel part on the AR15 would be my advice. I have been able to do all the heating necessary with a hot air gun, which is used to loosen up Loc-tite and things of that nature. 7075 aluminum is about as hard as you want for a receiver.
I have used a small butane torch for many years with out any problems. Just keep the flame moving till the desired heat is applied evenly and you wont have any problems.
I have used a small butane torch for many years with out any problems. Just keep the flame moving till the desired heat is applied evenly and you wont have any problems.