Fixed: 18" Alexander Arms barrel: 2.5+ MOA

[Lastrites]

I highly advise the use of a Magpul Bevblock when torquing a barrel nut or such. It's a nice multipurpose tool that mates up to the locking lug recesses to keep stress off of the upper receiver.

I've used a Bevblock many times and it works well but note that I would never use it for muzzle devices. Barrel blocks for muzzle work are the way to go.