NBS 14.5" 5.56 NATO M4A1 SOCOM Carbine Complete Upper w/ FSB - 25897
Out of stock
M4A1 Block 1 SOCOM Complete Upper – Military-Grade Performance and Precision
The M4A1 Block 1 SOCOM Complete Upper delivers unparalleled reliability and accuracy, designed for the discerning shooter who demands military-grade performance. Featuring a 14.5″ chrome-lined SOCOM barrel with a 1:9 twist, this upper is built to handle the toughest conditions while delivering exceptional accuracy.
Key features include:
- Anodized, Flat-Top Upper Receiver:Â Offers a sleek, durable finish and a versatile platform for optics.
- 14.5″ Chrome-Lined SOCOM Barrel:Â Built for durability and precision, with a 1:9 twist rate and an A2 flash hider, ideal for defensive use.
- Dirty Bird 2-Piece Drop-In Quad Rail: Provides ample rail space for mounting grips and other accessories, with Ergo Rail Covers for added comfort and control.
- Magpul MBUS Gen 3 Rear Sight:Â Lightweight and adjustable, offering rapid target acquisition and reliable performance.
- AO Precision Mil-Spec C158 Bolt Carrier Group (BCG):Â MPI/HP tested for superior strength and dependability, ensuring optimal cycling and performance.
- Mil-Spec Charging Handle:Â Durable and designed for smooth operation, allowing for easy and consistent chambering of rounds.
This M4A1 Block 1 SOCOM Complete Upper is not just a great addition to your military-style collection – it is a top-tier, performance-driven component that guarantees Sub-MOA accuracy with match-grade ammunition and proper shooting technique. Whether you’re outfitting a new build or upgrading an existing rifle, this upper is designed for those who demand the best.
Made in the USA and backed by a Lifetime Warranty, this upper is a reliable and high-performance choice for tactical applications, recreational shooting, and serious collectors alike.
NBS — Our In-House Brand for Builders Who Demand Reliable Performance and Real Value.
Designed for builders who demand reliable performance and real value without unnecessary hype or inflated pricing. NBS stands for "No Bullshit."
Built on Strong Industry Partnerships
Through the strong partnerships AR15Discounts has built with trusted suppliers and vendors, we regularly gain access to premium components often manufactured by or for leading industry names. By purchasing these in volume, we bring them to you under the NBS label, ensuring proven quality reaches your build at a fair price, without the added cost of extensive marketing.
Quality You Can Trust
Every NBS product is specified to the exacting standards we apply to our own rifles. Each component features precision CNC machining, American-made key components where it counts, robust materials, dependable steels, and durable finishes engineered for long-term reliability. These items are either sourced from reputable OEMs or carefully assembled in-house using established name-brand elements, maintaining consistent excellence throughout the lineup.
Complete Solutions for Serious Builders
From stripped and complete uppers to bolt carrier groups, handguards, lower parts kits, and beyond, NBS provides a unified, affordable selection that allows you to complete confident, high-performing builds.
Backed by a Limited Lifetime Warranty
All NBS products come with our Limited Lifetime Warranty for the original owner, covering defects in materials and workmanship. AR15Discounts stands firmly behind these parts because, as shooters ourselves, we use and trust them, delivering honest value and gear you can rely on.
| Weight | 78.4 oz |
|---|---|
| Dimensions | 14.5 × 3 × 3 in |
| Barrel Finish | Mag Phosphate |
| Barrel Profile | Government / SOCOM |
| Cartridge Compatibility | 5.56 NATO |
| Barrel Length | 14.5" |
| Gas System Length | Carbine |
| Twist Rate | 1-9 |
| BCG / Charging Handle | Included |
| MPN | 25897 |
| UPC | 25897 |
Compliance
NFA (National Firearms Act) compliance is crucial for legal ownership and transfer of regulated firearms and accessories like short-barreled rifles, suppressors, and certain types of ammunition, ensuring adherence to federal regulations to avoid legal penalties and ensure responsible firearm ownership.
