GC_UPC Troy Upper Receiver Kit A3 16in Barrel 15.125in SOCC ? BLK $562.00 SUPG-A3S-16BT-00 show more like this 14.95 TheGunDock.com GC_UPC Troy Upper Receiver Kit A3 16in Barrel 15.125in SOCC ? BLK $563.06 SUPG-A3S-16BT-00 show more like this Free on Firearms Acute Firearms GC_UPC Troy Upper Receiver Kit A3 16" Barrel Black With 15.125" Socc Rail SUPG-A3S-16BT-00???????? $606.34 SUPG-A3S-16BT-00???????? show more like this Firearms $18.45, Free over $500 Shooting Surplus GC_UPC Troy Upper Receiver Kit A3 16in Barrel 15.125in SOCC ? BLK $613.31 SUPG-A3S-16BT-00 show more like this Free shipping over $400 (Excludes Ammo) Gman Sport GC_UPC Troy AR-15 A3S Upper Receiver Assembly 5.56x45mm NATO 16 barrel with 15.125" Gen 2 SOCC Handguard - 601922" $626.90 SUPG-A3S-16BT-00 show more like this 15.00 MidwayUSA