FS/trade: AR-15 rifle. $875.00 Armalite factory upper. Link to upper. SOCOM MFG. Diamond series billet lower (incredibly rare and solid lower). These lowers are very rare and sought after. The trigger is fully adjustable and very smooth. There are very cool set screws holding in the springs. It also has a set screw to adjust spacing between upper and lower. Less than 100 rounds through the upper. Very nice shooting and accurate. Comes with rear iron sights (windage and elevation) and 2 magazines. Trade for Aimpoint, acog, .308 semi rifles/parts, 12 gauge shotguns, or??? Please email/pm with questions or trade offers.