Metal Upgrade Kit Suitable for Tokyo Marui M4 / M16 Series AEG Rifle For M4A1 Extended Battery Buttstock Package including Bolt set internal parts. Lower Receiver Shell. On both sides of the body engraved with instructions. Beautiful engraved with "CAL MUTLI MOD LFT-15" Marking and "Skull bones" Pattern Material : Alloy Metal Lenght: 240mm Weight(with box): 660g
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