Over the years and through many rounds, testing and evaluations I, along with others, discovered that a twist rate of 1/7.7 is the absolute best for optimizing performance from Black Hills 77 grain ammunition. Now thanks to BCM anyone can buy a complete upper tailor made for use with BH 77 grain variants." Kyle Defoor. June 2017.

Home / AR15 Upper Receiver Groups / BCM® KYLE DEFOOR UPPER RECEIVER GROUPS. Filter. Showing all 3 results Browse. ACCESSORIES. Bipods and Mounts; KeyMod™ Accessories; M-LOK® Accessories ... BCM® KD4 Spec Upper Group w/ KMR-A13 $ 1,165.95 $ 857.95. Sale! Add to wishlist. Quick View. 16" MID LENGTH UPPER GROUP BCM® KD4 Spec Upper Group w ...

KD4 Upper Group with twist rate designed for 77 grain Black Hills ammunition. Upper Group features: BCM® SS410 16" Mid Length Upper Receiver Group w/ BCM® MCMR-13 Handguard, 1/7.7 Twist Ionbond Finish on barrel.

KD4 Upper Group with twist rate designed for 77 grain Black Hills ammunition. Upper Group features: BCM® SS410 16″ Mid Length Upper Receiver Group w/ BCM® KMR *ALPHA* 13″ Handguard, 1/7.7 Twist Ionbond Finish on barrel.

KD4 Upper Group with twist rate designed for 77 grain Black Hills ammunition. Upper Group features: BCM® SS410 16″ Mid Length Upper Receiver Group w/ BCM® MCMR-13 Handguard, 1/7.7 Twist Ionbond Finish on barrel.

Buy BCM BCM® KYLE DEFOOR UPPER RECEIVER GROUPS Online from our collection of brand new BCM Firearms for sale. We ship to your desired FFL dealer in the shortest time possible

2020年4月25日 · KD4 Upper Group with twist rate designed for 77 grain Black Hills ammunition. Upper Group features the BCM® SS410 16" Mid Length Upper Receiver Group w/ BCM® MCMR-13 Handguard, 1/7.7 Twist DLC Finish on barrel.

KD4 Upper Group with twist rate designed for 77 grain Black Hills ammunition. Upper Group features: BCM® SS410 16" Mid Length Upper Receiver Group w/ BCM® MCMR-13 Handguard, 1/7.7 Twist Ionbond Finish on barrel. "Black Hills Ammunition has been making the most accurate and lethal 5.56 cartridges for years.

Overview of the rifle I took to Kyle defoor scoped carbine class. Can: Griffin Armament Optimus MicroUpper: BCM KD4 Lower: Areo thunder ranch edition Optic: ...

BCM. BCM® MK2 Standard 16" Mid Length (ENHANCED Light Weight-*FLUTED*) Complete Upper Receiver Group w/ KMR-A13 Handguard