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Rosco Bloodline 16" M4 5.56 NATO Carbine Length Gas

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Rosco Manufacturing Bloodline 16" M4 5.56 NATO Carbine Length Gas
Part Number: RM-BL-16-M4-556-7-C
Availability: Out of Stock. 0
In-store Pickup Available in Marianna, FL

16" M4 5.56 NATO Bloodline Barrel: This Rosco 16" M4 5.56 NATO Bloodline Barrel is the perfect addition to your next build featuring perfect balance, properly sized gas ports in order to optimize performance and reduce premature wear and tear from over gassed barrels.

Our Rosco 5.56 (NATO) barrels are designed to meet the modern day carbine shooters requirements. We are a long way from our daddy’s “Sporter” AR, and those specs just won’t cut it anymore. From properly managed dwell times for SBR’s, to running Suppressed, or setting up a balanced patrol carbine we have incorporated your needs into our engineering. We have successfully accomplished this by picking the right twist rates, gas port diameters, and barrel materials according to the barrel we are making (not a lazy blanket method). We have also balanced input from our consumers and military end users in order to bring you the product you need, not just the one we want to sell you.


Barrel Length16"
Barrel Weight28.97 oz
Barrel Material4150 CMV
Barrel Caliber5.56
Barrel Profile




Barrel Thread

1/2 x 28

Gas Block Size


Gas System Length

Barrel Crown

11 Degree

Barrel Finish


Barrel Extension Finish


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