M4 / AR Castle Nut, Receiver Extension (Buffer Tube) castle nut. Matte black finish.
TECHNICAL SPECIFICATIONS
PLATFORM | MK4 |
M4 / AR Castle Nut, Receiver Extension (Buffer Tube) castle nut. Matte black finish.
PLATFORM | MK4 |
LOWER PARTS
LOWER PARTS
LOWER PARTS
LOWER PARTS
LOWER PARTS
LOWER PARTS
LOWER PARTS
LOWER PARTS
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