13.9″ Ar-15 5.56/223 Upper (Legal rifle, 16″+)
- 13.9″ 4150 Chrome Moly (CMV) Barrel. (0.2 longer than 13.7″ for more muzzle device options).
- 1:7 twist.
- m4 feed ramps.
- 556 NATO Chamber (shoots both 5.56 and 223).
- Mid Length gas system
- .750 Steel Low Profile Gas Block.
- Dust cover, Forward Assist installed.
- Competition muzzle brake (differs from A2).
- 12″ Free Float M-Lok Handguard
M16 BCG & Charging Handle available in options. This comes professionally assembled and ready to go. If you order our BCG, we’ll test fire with that one prior to shipping.
Optimize your AR-15 with the MSF 13.9″ Pin & Weld 5.56/.223 Rifle Upper Assembly, engineered for enhanced maneuverability without sacrificing performance. The pinned and welded muzzle device extends the barrel length to a legal 16 inches, ensuring compliance with regulations.
Key Features:
- Barrel: 13.9-inch 4150 Chrome Moly Vanadium barrel with a 1:7 twist rate, suitable for both 5.56 NATO and .223 Remington rounds.
- Muzzle Device: Pinned and welded to achieve a total length of 16 inches, eliminating the need for NFA registration.
- Handguard: Free float M-LOK handguard provides a stable platform for accessories and improved accuracy.
This AR15 complete upper is ideal for shooters seeking a compact yet compliant rifle setup, offering reliability and versatility for various applications. Bolt carrier group and charging handle are available as optional upgrades.
13.9 p&w – 13.9 pin and weld upper, picked the SA adjustable gas block and the silincerCO asr flash hider. They installed everything and the icing on the cake is they filed down the weld and painted it!! 4 stars only because i havent shot it yet. Great work guys!
Great upper – Heavier than expected given the length, which must come from the hybrid handguard with lots of pic rail space. A trade-off I’m willing to make for a great upper that worked flawlessly.
Best Upper for the Price – If you’re in the market for a budget upper I would highly recommend you go with mid state! I had grouping size around a half dollar at 100 yards.
Arrived fast, Great customer service – This upper was better than i expected. Shipped fast than i was expecting. I ordered the wrong hand guard, and was contacted about it prior to assembly and got it sorted out at no extra cost.
Nothing better for customized uppers – This shop had so many options for customized uppers and was the only one I could find that would pin & weld the SureFire SF3P. My order was completed and shipped surprisingly fast and I had it in Texas mounted and firing in less than a week from ordering. I know that might not be the case all the time but I was still very impressed. Even the packaging was meticulous and put to ease any concerns I had about possible damage in transit. Muzzle device weld & timing were perfect and everything else I checked was torqued to spec. I will recommend MSF to my friends in the market.