Who makes the best armorer's wrench for ARs? Particularly, for breaking loose the castle nut on the buffer tube to remove the tube from the lower receiver. Your thoughts are appreciated.
Old Colt style round pin nuts?
Or the more common type with notches seen today?
In either case?
Grind out the staking punch mark with a Dremel carbide bur.
If there is a chance it was put on with Lock-Tight?
Heat it smoking hot first.
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