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MSF 12.5” Pistol 5.56/.223 Ar15 Upper Assembly

Original price was: $349.00.Current price is: $299.00.

-14%

Complete your upper

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

Style *

(+$59.99)

Charging Handle Options

(+$15.00)
(+$25.00 $19.99)
cheap ambi charging handle
(+$19.99)
(+$75.00)
(+$125.00 $99.00)
(+$79.99)
(+$94.95)
(+$79.95)
(+$79.95)
(+$45.00)
(+$79.95)
(+$45.00)
(+$45.00)
(+$79.99)
(+$45.00)
(+$79.99)
(+$79.99)

Gas blocking charging handle

Customize your upper

Handguard Options

(+$35.00)
(+$35.00)
(+$35.00)
(+$49.00)
(+$49.00)

Gas Block Options

(+$89.99)

Barrel Options

Pin/Weld Muzzle Device?

Muzzle Device Options

(+$30.00)
(+$35.00)
(+$35.00)
(+$75.00)
(+$75.00)
(+$35.00)
(+$60.00)
(+$94.00)

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

(+$169.00)
(+$115.00)
(+$169.00)
(+$169.00)

Suppressor Adapter

(+$94.00)
(+$34.99)
(+$34.99)
(+$65.00)
(+$65.00)
(+$12.95)
(+$12.95)
(+$17.95)

Custom Dust Cover Engraving

Foregrip Options

(+$23.00 $21.00)
(+$33.00)
(+$33.00)
(+$23.00 $21.00)

Sights / Optics

(+$25.00)
(+$125.00)
(+$149.00)
(+$577.00 $499.00)
(+$249.00 $179.00)
(+$211.00 $159.00)

Light Options

Arisaka 300 Series with Malkoff E1HT Head and Momentary Tailcap
Arisaka 300 Series with Malkoff E1HT Head and Momentary Tailcap $185.00

Folding Adapter

(+$199.00)

Silencer Use?

Do you plan to use a silencer?

Make sure the threads clear the rail, contact me if any issue.

Make sure barrel threads clear rail, and leave muzzle device loose.

We will build as designed and tighten muzzle device.

Tools / Extras

(+$8.00)
(+$9.99)
(+$9.99)
(+$5.99)
(+$3.99)
Product price: $299.00
Order total:
Free shipping on all orders over $350
MSF 12.5” Pistol 5.56/.223 Ar15 Upper Assembly
MSF 12.5” Pistol 5.56/.223 Ar15 Upper Assembly $349.00 Original price was: $349.00.$299.00Current price is: $299.00.

The MSF 12.5″ Carbine-Length 223 Wylde Upper Receiver offers a compact yet effective solution for AR-15 enthusiasts. Its shorter barrel enhances maneuverability, making it suitable for close-quarters applications without compromising performance.

  • 12.5″ 4150 CMV Nitride Ar15 barrel.
  • 1/2-28 threads.
  • Carbine gas system.
  • .750 Steel low profile gas block.
  • Free Float M-LOK Handguard.
  • 7075-t6 Mil Spec Aluminum Upper Receiver, Anodized black.
  • Dust cover and forward assist installed.

Key Features:

  • Barrel: 12.5-inch 4150 CMV Nitride barrel with carbine-length gas system, ensuring reliability and optimal cycling.
  • Caliber: Chambered in 5.56 NATO, also compatible with .223 Remington ammunition.
  • Handguard: Free-float M-LOK handguard, providing a lightweight platform for accessory attachment.
  • Receiver: 7075-T6 Mil-Spec aluminum upper receiver, anodized black with M4 feed ramps.

This upper receiver is perfect for building a compact AR-15 pistol or short-barreled rifle, offering versatility and performance in a smaller package. Customize it to your preferences and enjoy a reliable addition to your firearm collection.

Additional information

Weight 4 lbs
Dimensions 26 × 4 × 4 in
Barrel Size

12.5"

Caliber

5.56/.223

Style

Pistol

4.8
Based on 9 reviews
5 star
78
78%
4 star
22
22%
3 star
0%
2 star
0%
1 star
0%
1-5 of 9 reviews
  1. CA

    Near perfect – The upper was near perfect, everything on it was great. My only complaint was the iron sights I got with it, and to be fair they are quite cheap to add on. But lord do they look and feel like they came from temu. But other than that, everything was perfect and it was shipped like it was a box of eggs. Not a scratch on it.

  2. C

    Happy Happy – Built my first AR and wanted a stripped down pistol. This was just what I wanted. The custom options and choices were right on the mark. Since I shoot this suppressed the adjustable gas block was just what was needed. Very pleased and recommend Mid State.

  3. MD

    12.5 Upper – Shipping was fast! Was my first AR Build and was EXACTLY what I wanted .The customization options were awesome. Will be back

  4. MA

    MSF 12.5 upper receiver 👍 – So I have served for 17 years in the Navy (Special Forces) and my Son in Law is just like a son to me so for his birthday I wanted to do something special for him, so I decided to purchase him a 12.5 upper receiver a long with mine. Then I added some special upgrades to his, sure fire scout light, glass breaker can, unity riser, vector red dot, Daniel Defense iron sites, ambi charging handle, and static green laser to finish off the build. It been a few weeks since I made the purchase from you guys and last weekend was the first time we got the chance to put 500 rounds through both of the barrels, they both performed with excellent results and I mean excellent in every area. He was like a kid in a candy store. I have to say I really appreciate the fast service in the shipping, the work you guys put into the rail and assembly as well as the barrels, gas blocks and gas tubes. This weekend we will be testing them on the long range targets. All in all I would have to say I’m very happy with the purchase. And my Son in-law loves it some I’m pretty sure he sleeps with it in the bed with his and his wife (My Daughter) but I can honestly say he loves it and I’m looking forward to training with it ever more. Excellent job you guys.

  5. FW

    12.5” upper – Great product and fast delivery.