not exactly rocket science but it worked well.This afternoon I was mounting a scope I did some tradin for.When I got done I was going to check the timing of the brake and I already had one of the levels sitting on the gun. I was fiddiling around eyeballin the brake so I could snug the crossbolt and call it good. I had the tube out of a level sittin on the table and I put it in the brake port and it worked great to level the brake so I figured id post it up.

the level tube was pillaged from cheap harbor freight string level. the tube sits nicely in the MIL-STD integeral rail on 591's as well

the level tube was pillaged from cheap harbor freight string level. the tube sits nicely in the MIL-STD integeral rail on 591's as well