I recently got a complete .300 blk AR pistol from psa with a 7.5” barrel. I was going to swap out the bcg it came with for a BCM m16 BCG I’ve got at home. I’ve got no experience with ARs with barrels shorter than 16”. Is there any reason the BCM M16 BCG would be less optimized in this short pistol?

Below is all the info I have on the BCG it came with: Full-auto profile bolt carrier group. Shot-peened, mil-spec Carpenter No. 158® steel bolt. Gas Key Hardened to USGI Specifications, Fastened with Grade 8 screws, and Staked Per Mil-Spec.