KA Tech Carbon “Ruby” Skeletonized Polarstar F2 HPA M4 “Type 4” external-parts you'll shoot better than the

you'll shoot better than the rest

Barrel Thread Spec: 14mm Negative

Swap parts

Fit 20mm Picatinny rails

1 magazines

KA Tech Carbon “Ruby” Skeletonized Polarstar F2 HPA M4 “Type 4” external-parts you'll shoot better than theThis is KA Tech Airsoft's Carbon "Ruby Type 4. It uses handcrafted carbon and aluminum together to create the ultimate CQB M4 Internals are finely tuned to work together as one cohesive unit. If you'd like to swap out any of the parts for different ones such as an HPA engine, trigger, Hopup, etc, please let us know. Polarstar Jack (not F2 shown that why price is $100 less than other Ruby listings) Retro Arms Hopup Maple leaf bucking Flat Hop ZCI 6. 02