Bloodline 14.5” M4 5.56 NATO (Mid-Length)

$145.00

14.5” M4 5.56 NATO Bloodline Barrel (Mid-Length): This 14.5” 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. ALL NFA RULES APPLY!

(2 customer reviews)

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14.5” M4 5.56 NATO Bloodline Barrel (Mid-Length): This 14.5” 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. ALL NFA RULES APPLY!

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 Length 14.5″
Barrel Weight 26.34oz
Barrel Material 4150 CMV
Barrel Caliber 5.56
Barrel Profile

M4

Twist

1/7

Barrel Thread

1/2 x 28

Gas Block Size

.750

Gas System Length

Mid-Length
Barrel Crown

11 Degree

Barrel Finish

Nitride

Barrel Extension Finish

Nitride

Browse all of our 5.56 NATO Bloodline Barrels >>

Additional information

Weight 2.0 lbs
Dimensions 19.5 × 2.3 × 2.2 in

2 reviews for Bloodline 14.5” M4 5.56 NATO (Mid-Length)

  1. John Leonard (verified owner)

    The quality of this barrel cannot be over-stated. I ordered this barrel on a Thursday and waited through the weekend and beginning of the next week for it to ship. When I didnt receive a “shipped” notification, I emailed customer service. They emailed me back within 5 minutes telling me my order was shipping that night. It did and my barrel was on my front porch within 48 hours. The quality of the barrel is apparent when you hold it in your hand. Also the fact that I had to thermal fit it into my receiver shows how precise the tolerances are with Rosco products. All in all, from top to bottom, my experience with Rosco has been nothing but a pleasure. Great product, great customer service, great shipping time, sub MOA accuracy. Cant complain.

  2. S. Atkins (verified owner)

    This my second build with Rosco. I love quality of the craftsmanship. Fast shipping as always.

    Keep up the good work.

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