OTR-15 Billet Lower Receiver and UpperHandguard: 12.5" ODIN Works M-LOK O2 Lite Barrel: 16" 223 Wylde Stainless Steel Match Grade BarrelGas System: ODIN Works Tunable Gas Block, Mid-Length Gas SystemBolt Carrier Group: ODIN Works 223 Black Nitride BCGStock: B5 Bravo Stock, 3oz Buffer paired with Stainless Steel Carbine Spring and Ambi-Sling/QD Back PlateLower Receiver Equipped With Following Parts:Magazine Release: eXtended Magazine Release Gen3Safety: ODIN Works Ambi-SafetyGrip: B5 P-Grip - Black Bolt Release: ODIN Ambi Bolt Release & Extended Bolt Catch