COLT M4 5.56 UPPER RECEIVER GROUPS | Sinclair Intl

Add the Colt legend of reliability to your rifle or build with these complete feature 1/7 RH twist in a chrome lined, button rifled barrel.  Available with or without a charging handle, bolt carrier group, and back up sights. All NFA rules apply.

NOTE: “Stripped” does NOT include bolt carrier group (BCG), charging handle, or rear backup sight


AR-15, Issue:11, Page:003
Big Book Catalog, Issue:73, Page:003

COLT - M4 5.56 UPPER RECEIVER GROUPS

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2 Item(s)
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Cartridge: 5.56 mm NATO

Finish: Black

Length: 16"

Style: Complete

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Cartridge: 223 Remington, 5.56 mm NATO

Finish: Black

Length: 14.5"

Style: Complete