I am planning on doing a 300 BO build this summer. I want a barrel that is at least 10.5". I haven't decided on SS or not. I do prefer heavy short barrels. I will be mounting this new build on a Colt Commando, Model 6933 and occasionally on a Colt M16. I will also be mounting an OSS 762 Ti Suppressor on it.

Looking at some barrels options I see two twist rates, 1/7 & 1/8. I also see some barrels with 5R Rifling.

Any suggestions on the twist rate and Barrel Manufacturer?