Mototech enhanced buffer spring Mototech enhanced buffer pad Mototech torx screw replacements Midwest Quad Rail GG&G Charging handle BCM Grip Surefire Warcomp Pin and Weld to 16" D. Wilson chopped the barrel from 16" to 13.7" D. Wilson did Surefire gas jets as well. Will trade for nnvt tanto plus cash or multi guns if gun and cash or just cash. Will add acog for 800 8176599685