Im a Retired Toolmaker and finished this 80* Lower last Spring to have an AR in a larger bore for "Plinking". The Lower is a HellFire Armory 80* with Geiselle SSA FCG and a Tubb Spring. On top of this is the PSA 10(Yep, I worked through those "Issues" as well) with 16 Heavy Barrel with a Fortis Mfg. Muzzle Brake, a Midwest Ind. 15" Guard, 4x16x44 Leatherwood Glass(Our range is only 200 yards) and a Harris Bi-Pod. With lots of fine tuning It runs waaaay better than I imagined. Solid, so I'm glad I finished the 2nd one identical to this one. The only benefit I've found with these 80* Lowers verses "Complete" ones are the Billet Hellfire are Rock Solid and gave me incentive for the build. Safe Shooting.