Colt Manufacturing
M4 Upper Receiver
P/N: SP63528
Genuine Colt M4 upper receiver assembly built to Colts M4 specifications.
These upper receivers feature M4 feed ramps, and a pre-installed dust cover and forward assist. Hard Coat Type III anodized with dry film lube on the interior.
These uppers come with varying forging marks, some marked with CAGE codes, and some without.
What’s Included
1x Colt M4 Upper Receiver
Specifications
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