MSF 20” 5.56/.223 Wylde Ar15 Upper Assembly with 15″ gen3 MLok – blem



Complete your upper

Add a bolt carrier group and charging handle to complete your upper.


Charging Handle Options

Gas blocking charging handle

Customize your upper

Handguard Options

Gas Block

Muzzle Device Options

Fits Specwar, Saker, Hybrid, Omega, Harvester ASR Mounting System

Suppressor Adapter


Custom Dust Cover Engraving

Foregrip Options

Optic Options

Light Options

Folding Adapter

Lower Parts ?

Ar15 Standard Lower Parts Kit LPK $49.99
Velocity 3lb Enhanced AR-15 Lower Parts Kit LPK $199.00
Ar15 Mil Spec Carbine Buffer Tube Kit $39.99

Tools / Extras

Product price: $299.00
Order total:

Free shipping on all orders over $500

Build a super accurate Ar-15 with this premium 20″ Nitride upper. Features:

  • 20″ 4150 CrMoV Nitride Barrel
  • 223 Wylde chamber (shoots 556 / 223), Wylde for improved accuracy
  • Other fluting /barrel / rail options available in menu
  • Rifle length gas system
  • 1/2-28 threads
  • 7075-t6 Mil Spec Aluminum upper, anodized black,
  • m4 feed ramps
  • Dust cover, forward assist
  • 15″ Free Float gen3 MLOK handguard
  • Select other options such as BCG, charging handle, optics, available in menu.

Assembled, Test-Fired, and QC’d In-House

We assemble everything in-house, completely customized to your order. Our engineers have many years of experience in the industry, making sure that everything that goes out the door is built to the highest standard possible.

Prior to shipping, we test fire and follow a strict quality control protocol, paying extra attention to the gas system and headspace, ensuring that your AR-15 will function properly and will reliably fire in all cases. 

High-Quality Components

Over the past 10 years, we have carefully refined the parts we use for our AR-15 uppers. We only use high-quality components in our builds that have been sourced from proven manufacturers and OEMs.

We have built tens of thousands of AR-15s and ensure reliability, durability, and accuracy in all of our products.

Limited Lifetime Warranty

We guarantee your upper will function properly as intended.  We stand behind our products and have a limited lifetime warranty on the uppers that we sell.  Our warranty protects against defects in product, material, or workmanship.

If there is an issue, simply contact us, and we will handle it. We will repair/replace items if necessary. 

Additional information

Weight 6 lbs
Dimensions 36 × 4 × 4 in
Barrel Size






Model Style


Thread Pitch