115" 556 Nato 17 Ar15 Upper Receiver with 10" free float 16 Straight Fluted Rainbow PVD Oilslick 223 Wylde ss Ar15 Barrel 3lb Velocity Ar15 Drop in Trigger 3lb Straight w/ finger stop $ $ $ $ $ Ar15 Cobra Adjustable 6pos Mil Spec stock kit Black 18" SS 223 Wylde 18 Rifle length Ar15 Upper w 15 MLok Rail AR15 XL Assembled Upper ReceiverAs a side note, the 50 Beowulf does have slightly more recoil energy than the 450 Bushmaster and 458 SOCOM in the above table, but that's due in large part to the fact that the 50 Beowulf load was being fired from a heavier rifle For comparison, that same Beowulf load would produce 305 ftlbs of free recoil energy when fired from a 75 pound rifleAERO PRECISION AR15 XL STRIPPED UPPER RECEIVER FORGED 7075T6 ALUMINUM APARC BLACK $8500 MSRP Add to Cart Buy Now Quick view Alexander Arms Ar 15 Upper Receiver Kit 50 Beowulf 16 5 Threaded Barrel With g Black 50 beowulf ar 15 pistol upper