MCX RATTLER UPPER ASSEMBLY
Complete 5.5" upper assembly kit for your MCX Rattler in 300BLK.
DETAILS
Convert any MIL-SPEC AR Lower into a MCX Rattler. Complete with upper assembly, lower receiver stock adapter kit, side folding AR buffer tube knuckler, and match duo trigger kit.
Specification
Model - SIG MCX
Barrel Length - 5 in
Caliber - 300 Blk
