Custom built by myself. This gun shoots very smooth and will drive tacks all day. I used it for some competitions and has about 600 rounds through it, maybe less. Build parts are as fallows: Upper- Mega Machine smooth side billet Lower- Seekins Precision SP-223 Barrel- JP Rifles 223 Supermatch Stainless heavy barrel with JP blended muzzle brake (this makes for a smooth transition frome muzzle devise to the barrel. They almost look like one piece.) JP Rifles adjustable gas block Vtac rifle length free float tube JP Rifles Low mass carrier with QPQ hard coat treatment JP Rifles Enhanced Bolt JP rifles Low Mass buffer and spring Ace Tactical skeleton butt stock Hogue pistol grip Timney 3lb trigger BCM gunfighter Charging handle American Defense scope mount Burris XTR-14 1x4 optic with MGM quick throw lever I have about 2300 into this gun without scope. with scope and mount there is about $3100 invested. Edit: Cash price of $1500 and I'll throw in a few Pmags. Looking to trade for an good condition M1A scout with walnut stock or MAYBE a standard length. Now considering a synthetic stock option as well so if you have an M1A to trade let me know.