Cobalt CK-Pro Fast Eddie 5.56 NATO


*view the Cobalt CK-Pro 5.56 NATO 16-inch barrel rifle


  • Upper receiver: 7075 T6 billet aluminum
  • Lower receiver: 7075 T6 billet aluminum
  • Handguard: 6061 aluminum
  • Muzzle device: Cobalt RCB-KM
  • Trigger: Geissele G2S
  • Charging handle: Radian Raptor LT
  • Safety: Cobalt ambi-safety
  • Mag release: ambi mag release
  • Grip: B5 Systems pistol grip
  • Buffer tube: VLTOR 5-pos
  • Buffer system: Cobalt pro buffer system
  • Buffer end plate: B5 Systems
  • Forward Controls Design Castle nut

Cobalt CK-Pro Fast Eddie 5.56 Review

The Cobalt CK-Pro Fasts Eddie is a high-performance rifle designed by Cobalt Kinetics in collaboration with Greenline Tactical, boasting a 13.95” K9 series hybrid barrel manufactured by Rosco Mfg. The barrel has a twist rate of 1/7 RH. It also utilizes a mid-length gas system and is crafted from 416R Stainless Steel, which is electro-polished for enhanced durability.

This modular rifle is built around a robust 7075 T6 billet lower, while the upper made of the same material features Cobalt’s S.I.M.S. system for an integrated, streamlined design. The CK-Pro Fast Eddie is equipped with several key components that ensure optimal operation, including a non-adjustable Cobalt gas block with a .750 diameter, a Cobalt semi-auto bolt carrier group (BCG), and a Radian Raptor LT charging handle.

One of the standout features of the Fast Eddie is its compatibility with various optics, courtesy of a revolutionary mounting system. Additionally, it comes with suppressor-compatible RCB muzzle devices.

Our rental Cobalt CK-Pro Fast Eddie rifle is equipped with the Eotech EXPS3 holographic sight. Come to GRITR shooting range to experience this 5.56 rifle at a sound rental price.