16" M4 5.56 NATO
Bloodline 14.5” M4 5.56 NATO (Mid-Length)
From: $152.00 Select options

Bloodline 14.5” M4 5.56 NATO (Mid-Length)

From: $152.00

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!

(6 customer reviews)

Melonite Gas Tubes

Our Rosco Melonite Gas Tubes have an extremely durable Black Nitride finish that increases corrosion resistance, wear resistance, fatigue strength and cosmetic appeal. These gas tubes work great under a handguard because they are more durable than standard gas tubes. Available in pistol, carbine, patrol length, mid-length, and rifle lengths. Does not include a roll pin.

Non-Adjustable Gas Block

Our Rosco Non-Adjustable Gas Blocks are purposely designed to be lined up perfectly with our barrels and gas ports to ensure reliable cycling every time. We have created two options for the end user; Our Non-Adjustable gas block is a direct plug in for any one of our barrels and has provisions for pinning, our Adjustable block picks up where our standard block leaves off and works perfectly for shooters that want to be able to control their gas flow for suppressed applications.

Adjustable Gas Block

Our Rosco Adjustable Gas Block is purposely designed to be lined up perfectly with our barrels and gas ports to ensure reliable cycling every time. We have created two options for the end user; Our Non-Adjustable block is a direct plug in for any one of our barrels and has provisions for pinning, our Adjustable gas block picks up where our standard block leaves off and works perfectly for shooters that want to be able to control their gas flow for suppressed applications.

In stock

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

Melonite Gas Tubes

Length

Mid Length

6 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.

  3. Don (verified owner)

    I have used Rosco barrels for some time now and the results have been great! It is not uncommon, with match ammo or reloads, to achieve sub-minute of angle accuracy, and in some cases, with matched components, to achieve sub-half minute accuracy. Great products!

  4. John

    I have done plenty of research when it comes to buying gun products and reviews. This is one of the best barrels on the market when it comes to the gun industry for entry level price. When I received it in the mail it was perfectly on time and the customer service actually care for the customers in a fast rate as possible and faster than any other company I have ever purchased from, also they will reply to you asap if you have any questions. This barrel is proven to be very accurate by very reliable sources out there and the barrels last long just as any other barrel out there on the market as well. If anyone purchases this barrel then it will meet all their needs and will be very satisfied. “Rosco Gang for Life”

  5. Gimli (verified owner)

    Roscoe is the best quality per dollar bar none. It begins with fast shipping. Open the box and find the most well packaged products in the business. During your build, the quality is self evident by the fit and finish. Finish the build, the reliability and accuracy are equal to parts costing in excess of 2x the amount.
    Roscoe & I could rule the world!

  6. J.R. Tharp (verified owner)

    The Rosco Blood Line Barrels are a premium product for a great price. You can’t beat the quality and the great customer service anywhere that I’ve been. I thank you for both your uncompromising quality and service.

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