I am new to the forum but have subscribed. I want to replace my Mod 12 LRPV barrel in 223. The current barrel is a 1 in 7 twist with more than 4k rounds through it. From reading on here, I have decided to go with a Criterion barrel from Jim Briggs. I want to keep the 1 in 7 twist and go with the stainless bull barrel at 26". My question is what if anything do I need to change out this barrel besides a barrel nut wrench, barrel vice, action wrench, and set of go - nogo gauges? As this is my first barrel swap, any advice or help would be greatly appreciated.