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ICS UK1 Upper Gearbox for Transform4/UK1/MK3/HOG/EBB
ICS UK1 Upper Gearbox for Transform4/UK1/MK3/HOG/EBB
ICS UK1 Upper Gearbox for Transform4/UK1/MK3/HOG and EBB models
Includes: Upper gearbox, tappet plate, piston, piston head, spring, spring guide and bolt cover blowback system.
supplied with SP-120 (M120) spring
For ICS UK1, Mk3, HOG EBB series an EBB M4s such as ICS-321
It is a quick change spring ICS upper just like all ICS uppers
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