This has a Stoner Receiver, SAA (Not Surplus Ammo and Arms) 1/9 Twist 16" M4 Barrel, Birdcage Flash Hider, MOE Rifle Length Handguard. This has the low profile carbine gas block under the handgrip and a Single Rail Gas Block on the front for use as a sight base. No BCG or CH is included. This is all new. Asking $375 shipped. Please PM for me for any other information.