Humm, good point Dietz. I figure it would be good to have that for tightening on a flash hider/muzzle break but then again, you don't need a whole lot of torque to install those. I guess I'm a gear junkie.
I got one of these upper blocks:
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I would still use those with the method I highlighted, on the side with a block on top (with that one it would be bulletproof + exotic receiver compatible). These kind of blocks, altho this one has a part that gets inside to the top of the receiver, which is good, but still the majority don't, are more responsible for twisted receivers and broken takedown lugs than any other receiver blocks on the market. Those two lugs were not designed to take the kind of twisting torque installing a barrel nut implies just by themselves.
Also I would recommend anyone who wishes to un/install muzzle devices to not use a receiver block, but a barrel vise block, as close to the muzzle as possible. Failing to do so can very potentially result in barrel ext. index pin or receiver notch damage.


















































