The Griffin MK2 rifle series builds on the features of the MK1 by improving the foundation of the rifle; its lower receiver. The Griffin MK2 fully-ambidextrous lower receiver is manufactured using state-of-the-art aerospace manufacturing techniques to derive sub-mil-spec tolerances and unparalleled quality. Front to back Griffin rifles leave no stone unturned. - All control features are mirrored affording full-ambidextrous functionality using intellectual property developed by Griffin Armament circa 2013. - The MK2 PATROL 14.5 .223 Wylde Carbine features a tuned mid-length gas system and suppressor optimized buffer system ensuring a soft yet reliable gas system suppressed or unsuppressed. The 416R SS barrel provides exceptional accuracy and durability. We ran one of these barrels to 47000 rounds 100% suppressed while test firing suppressors with zero baffle strikes and the rifling was still present. The barrel was retired due to extension lug wear not due to barrel rifling wear. Other case studies such as multiple M24 SWS barrels holding 0.35 MOA to 20000+ rounds in army testing provides further evidence that 416R SS is an extremely durable barrel material. - Parts List - Griffin Assembled Upper Receiver - Griffin Forged Full Ambi MK2 Assembled Lower w/ 60 degree Flared Magazine Well and Integrated Trigger Guard - Griffin 416R SS HEDP Barrel - Griffin Enhanced BCG - Griffin SN-ACH Gen 2 (Suppressor-Normalized Ambi Charging Handle) - Griffin Contour Connect QD End plate - Griffin Maritime Receiver Extension - Griffin AR-SOB (Suppressor Optimized Buffer) - Griffin AR15 Buffer Spring - Griffin Low Pro Rail System - Griffin PRIMO Gas Block (pinned) - Mid-Length Standard Profile Pinned Gas Tube - Griffin Silencer Mount Muzzle Device - Griffin Dimpled Takedown Pins - Griffin A3 Grip - Griffin RailShield 4-Piece Panel Kit - Griffin ECS (Extreme Condition Stock) - Comes with one (1) USGI D&H Industries 30-rd Magazine - Perpetual Lifetime Warranty