For sale or partial trade is an STS Arms, LLC ST4 Improved MOE . This AR has been coated inside and out by the manufacturer This AR15 if you know anything about STSARMS is a higher quality rifle than your M&P or your Colt. Below are the specs and the website is listed here: Gunsmithing at STS Arms LLC I am asking $1100 firm, or would take partial trade for a 4" GP100, 4" 686 or possibly a 3" SP101 (all in .357). This rifle is in mint condition and has 20 rounds down the pipe (which you cant even tell). Barrel: 1x8 twist, 4150 steel, salt bath nitride (Melonite), 16 mid length gas system advanced contour barrel, Front Sight: A2 FSB, F marked Muzzle device: Primary Weapons Systems FSC556 brake or Triad flash hider Caliber: 5.56mm NATO Bolt Carrier Group: M16 carrier, chrome lined, HP/MPI bolt, Microslick coated, improved chrome silicon extractor spring (red) Upper and lower receivers: 7075 forged aluminum, A4 flat top upper, mil-spec dimensions, Microslick coated interior Trigger guard: Magpul MOE Rear sight: Mapgul MBUS flip up, dual aperature (removed) Charging handle: 7075 forged aluminum, Black Rain Ordnance tactical latch, Microslick coated Buffer: Microslick coated Enidine AR-restor hydraulic buffer, red Cerakote coated action spring Grip: Magpul MOE Stock: Magpul MOE Hand guards: Magpul MOE Magazine: Magpul Pmag 30rd standard capacity Thanks, Todd 541.990.0858 if you need more pics ill text.