Hello all, I have a barreled receiver (308) that I’m collecting parts for to be sent in for the Mini G conversion. 1) Is there any certain OP rod that is better for modification than any other? I have to buy one, and I might as well get the proper one. Anything special to look for or avoid? I see some are, “cut and relieved”. 2) Does the end of a muzzle break count as the 16.1” barrel length? Id like to keep the OAL as short as possible. Thanks for your patience. Don