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Motor
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Rail system
Inner / Outer barrel
Receiver
Hand Grip
Stock
Flash Hider
Back-up Sight
Foregrip
Battery
SPR Mod0 Upper Rail
SKU :A&K-J022
MSRP :USD40.26
SPR Mod1 Upper Rail
SKU :A&K-J021
MSRP :USD47.74
M7799 Completed Receiver Rail
SKU :A&K-J020
MSRP :USD12.76
SPR Mod0/1 Receiver Rail
SKU :A&K-J019
MSRP :USD9.24