Has maybe 100 rounds through it, though I used the lower for a 45 banshee for a little bit. Larue Stealth 14.5 upper with larue muzzle brake pinned and welded. Larue lower with their spectacular MBT-2S trigger, geissele H1 super 42 buffer kit, Magpul grip, and b5 stock. This combo has zero recoil. Scope is an Eotech Vudu 1-6x on a larue qd mount. Sr3 reticle. I'm asking 2800 for the complete package, or 2000 for the rifle and 1000 for the scope.