I am seeking a gunsmith to perform a barrel swap on a SIG Sauer 716. They are both SIG barrels, and I can provide the proprietary barrel nut wrench, I sourced it from RevArms. However, the gas block is pressed on and will require a press for remove and replace. I would prefer a SIG trained smith, but one with 716 experience and a good reputation will do. The weapon is from 2013, mine the entire time, and I have run several thousand rounds thru it. The new barrel is an 18" as opposed to the original 16", and I am hoping maybe a better shooter than the original, which has been serviceable but never high performance.