M4 / AR Castle Nut, Receiver Extension (Buffer Tube) castle nut. Matte black finish.
M4 Receiver Extension Nut
CMMG
Gun Stuff/Rifle Parts/Buffer Tubes / Kits / Buffers / Parts
$8.99
CMMG-55CA9CB
815835017426
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MSRP:
$58.80
$42.99
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MSRP:
$58.80
$42.99
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Bravo Company USA
Mk2 Receiver Extension
MSRP:
$55.00
$49.95
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