Nice to see all the A1's in this thread. My A1 is based on a early Bushmaster and has a Colt 4X scope. I recently found a usgi three prong and replaced the dpms copy I had on it.
Another Bushmaster M4gery, I built this when YHM started producing their hand guards, flash hiders and fold down FSB's. RE and stock is a Vltor Emod and it has a Nikon M223 with Matech buis. Pearce 1911 grip.
This is for distant steel in 6.5G. I started with a Overwatch 24" barrel and upper. Original built with a AP lower and RRA two stage, I recently added a Alexander Arms lower and ArmaLite two stage lpk, changed the Vltor A5 to a UBR. Topped off with a 6.5-20X50 Vortex Viper.
Long range with power, Noveske N6 20" upper on a ArmaLite AR-10B lower. PRS stock, SWS hand guard, and sets on Atlas legs. I enjoy shooting this more than anything in the house.
More AR's...this is a 16" A3 upper on a AP lower, UBR, YHM, LMT sights with a PA micro on a ADM QD mount.
My iron sight shooter, a dpms mini sass bull barrel in a A2, custom lower with ArmaLite guts. The barrel is 1-8, very heavy and very accurate...it was very cheap. Apex mid length hand guard.
More parts came in yesterday, a fail zero BCG and CORE15 charging handle for a new PSA 16" upper, it well get a AP lower that has a LMT M4 stock. Probably a Aimpoint.