Bloodline 16” M4 5.56 NATO (Mid-Length)

16″ M4 5.56 NATO Bloodline Barrel (Mid-Length): This 16″ M4 5.56 NATO Mid-Length barrel was designed around the USASOC specs for an Improved Upper Receiver Group with a little bit of the Rosco touch as well. The longer gas system allows for a smoother gas curve which leads to managed dwell times. This combo creates a great balance of speed and performance.

Rosco’s  5.56 (NATO) barrels are designed to meet the modern day carbine shooters requirements. We are a long way from Rosco’s 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 Rosco’s 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 Rosco’s consumers and military end users in order to bring you the product you need, not just the one we want to sell you.