This rifle is a used Sig 551A1 with a grey lower and black pistol grip. Rifle now includes one Swiss magazine, and I will include a conversion kit for AR mags as well as four forty-round Promags, and three boxes (60 rounds) of .223 hollow point ammo. Swiss mags are expensive, but so is the rifle, so you can buy them separately if you want to. Also included is the scope pictured which is a red or green illuminated, quick-detach rail mounted CVLife 6-24X50AOEG, along with the VLTOR two-piece extendable bipod. This rifle is a combination of a black Sig 551A1 upper and a grey lower. It has a Samson quad-rail and a top-rail mounted on the forearm and over the dust cover. I am also including rail covers and there will be a replacement charging handle cover included. The barrel has the US threading so any M4 compatible can should work. Just handling this gun, not to mention shooting it, reveals the expert engineering and workmanship which are the legacy of the Swiss company. This is a GCA firearm and will ship to your FFL.