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I've had a couple complete PSA lowers sitting in my safe for a while now, bought them with the intention of building one cheap and one lightweight AR15 (I think I paid $185 each, complete, including shipping, with Magpul furniture).
I'd like to pick up a cheap upper to match, and I'd like to know which twist rate you guys would recommend for the best compatibility with the most types of ammo.
I'd like to pick up a cheap upper to match, and I'd like to know which twist rate you guys would recommend for the best compatibility with the most types of ammo.