Originally Posted by
bamashooter
Had one mil-spec barrel nut give fits. Eventually dremeled the delta assembly off due to I had no more hand strength left to press the wrench against the nut. Strongest spring I'd ever seen. Removing the hand guards confirmed it. I used penetrating fluids, frozen it, heated it (multiple times) to the point of melting the front of the receiver block (with indirect heat-gun heat), 9 lb sledge, 4-5 ft breaker bar, hours and hours. Gave up. Told a buddy about it the following morning and he said bring it over. Took my block and receiver, put them in his vise and said, "Hand me that "gun" wrench. Sticks the wrench on and one wack with a very nice, high dollar dead blow hammer broke the nut loose easily. Didn't even wind up, just a nice wack. From the time I handed the wrench to him, less than thirty seconds it was freed. Stunned, I shook my head and thanked him. Receiver and pin were just fine. Sometimes crap just happens. Sure seems to be the norm with the BCMs.