MSF 16″ 4150 Fluted .223 Wylde Complete AR-15 Upper – 10″ Gen3 M-LOK Rail, BCG & Charging Handle
Upgrade your AR build with a premium Mid State Firearms complete upper designed for precision, durability, and reliable performance. This 16″ .223 Wylde upper features a straight-fluted 4150 CMV barrel, lightweight Gen3 rail system, and comes fully assembled with a bolt carrier group and charging handle—ready to pin onto any mil-spec AR-15 lower.
🔥 Key Features
Precision 16″ 4150 CMV Straight-Fluted Barrel
- .223 Wylde chamber for improved accuracy with both .223 Rem and 5.56 NATO
- 4150 CMV steel for long-lasting durability
- 1:8 twist rate for excellent performance with a wide bullet weight range
- 1/2×28 threaded muzzle with your choice of thread protector or A2 flash hider
- Straight fluting reduces weight and improves cooling
Reliable Gas System
- Carbine-length gas system
- Steel .750 low-profile gas block
- Stainless steel gas tube
7075-T6 Mil-Spec Upper Receiver
- M4 feed ramps for improved reliability
- Hardcoat anodized finish
- Mil-spec machining for proper fitment
- See all AR-15 Upper Receivers
10″ Gen3 Hybrid M-LOK Rail
- Lightweight, rigid free-float design
- M-LOK slots for accessory mounting
- Integrated Picatinny sections for optics or front sights
- Ergonomic, slim profile for improved control
- Browse more AR-15 Handguards & Rails
BCG & Charging Handle Included
- M16 profile bolt carrier made from 8620 steel
- 9310 steel bolt, MPI inspected
- Mil-spec charging handle
- See other Bolt Carrier Groups
📌 Specs Summary
| Barrel Length | 16″ |
| Barrel Material | 4150 CMV |
| Chamber | .223 Wylde |
| Twist Rate | 1:8 |
| Gas System | Carbine |
| Gas Block | .750 Steel Low Profile |
| Receiver | 7075-T6 Mil-Spec, M4 Feed Ramps |
| Rail | 10″ Gen3 M-LOK Hybrid |
| Muzzle Threads | 1/2-28 |
| BCG | M16 8620/9310 Steel |
| Charging Handle | Included |
Why Choose This Upper?
- Accurate .223 Wylde chamber offers the best of both .223 and 5.56 performance
- Straight-fluted barrel reduces weight without compromising strength
- Fully assembled—no gunsmithing required
- Perfect for new builds or replacing an existing upper
- Pairs with any mil-spec AR-15 lower
Explore more complete uppers at: Mid State Firearms Complete AR-15 Uppers
sound of freedom – This was a great set up. I loved being able to customize the set up. Only issue I had was my own fault as a newb to building these. I used a heavy barrel in a slim hand guard. It makes adding attachments tough with clearances. Hoping someday to also get an AR10 from here.