Description
Remember the classic M16A2 you might have handled in service, or seen in countless films? That iconic silhouette, the fixed stock, the 20-inch barrel—it’s not just nostalgia, it’s a proven, reliable platform. The Colt AR-15A4 5.56/223 20″ Barrel, Detachable Handle, Adjustable Sights, 30rd Mag brings that legacy home in a semi-automatic, civilian-legal package. It’s the definitive “service rifle” configuration, built to the original military blueprint for unmatched durability and a specific, long-range shooting experience. At $1597.06, it’s a serious investment in a piece of American firearms history that also happens to be a supremely capable rifle.
So, what exactly is the Colt AR-15A4? It’s Colt’s factory-built, semi-automatic reproduction of the U.S. military’s M16A4 service rifle. This model features a 20-inch barrel with a 1-in-7 twist rate, a fixed A2-style stock, a detachable carry handle with integrated adjustable rear sights, and a standard front sight post. It’s chambered in 5.56 NATO/.223 Remington and ships with one 30-round magazine. This rifle is designed for those who value historical authenticity and the ballistic advantages of a full-length rifle gas system.
Key Features & Why It Matters
The 20-inch barrel is the heart of this system. That extra length gives you a higher muzzle velocity compared to common 16-inch carbines—think an extra 150-200 feet per second. This translates to a flatter trajectory, better long-range performance, and more reliable fragmentation of 5.56mm projectiles. The rifle-length gas system is also inherently softer shooting, as the pressure has more time to drop before cycling the bolt. It’s a trade-off in maneuverability, but for precision or sustained fire from a supported position, it’s a clear win.
Let’s talk about the sights. The detachable carry handle houses a fully adjustable rear sight for windage and elevation. It’s a simple, rugged, and incredibly effective battle sight system. If you want to mount an optic, you simply remove the handle (no gunsmithing required) to reveal a flat-top Picatinny rail. This dual-role capability offers fantastic versatility. The fixed A2 stock might feel dated to some, but it houses a longer buffer and spring for that smooth rifle-length action, and it’s rock-solid with no wobble.
Specifications
| Caliber | 5.56 NATO / .223 Remington |
| Barrel Length | 20 inches |
| Twist Rate | 1:7 inches |
| Stock | Fixed A2 Style |
| Sights | Detachable Carry Handle w/ Adjustable Rear, A2 Front Post |
| Magazine | 1x 30-round Colt USGI Aluminum |
Pros & Cons: The Practical Trade-Offs
Pros: You get superior muzzle velocity and long-range accuracy potential from the 20-inch barrel. The rifle-length gas system provides a noticeably smoother recoil impulse. Build quality is classic Colt—forged receivers and proper mil-spec materials. The detachable carry handle offers iron sight purity or easy optic mounting. It’s a historically significant, no-frills workhorse that’s compatible with a vast array of standard AR-15 parts and accessories from brands like Magpul and BCM.
Cons: The 40-inch overall length makes it cumbersome for close-quarters or vehicle use. The fixed stock isn’t adjustable for length of pull. It’s heavier than a modern carbine, coming in around 8.5 pounds unloaded. For the budget-conscious, you’re paying a premium for the Colt rollmark and this specific configuration—you can build a functional 16-inch AR for less. But can you build this iconic rifle with this level of fit and finish for the price? That’s the real question.
Who Is This Rifle For?
This rifle is for the purist, the history enthusiast, or the shooter who values ballistic performance over compact convenience. It’s ideal for someone wanting a “right out of the box” service rifle experience for target shooting, vintage service rifle matches, or as a dependable, long-range capable home defense option for a rural setting. It’s also a smart buy for the collector who appreciates Colt’s direct lineage to the original military contract rifles. This model is available at firearms-missouri.com for Missouri residents and nationwide, following all FFL transfer requirements.
Frequently Asked Questions
Q: Can I use .223 Remington and 5.56mm ammunition interchangeably?
A: Yes, this rifle’s chamber is rated for both 5.56 NATO and .223 Remington. You can safely fire .223 in a 5.56 chamber, but the reverse is not always recommended. Always consult your firearm’s manual.
Q: Is the front sight base (FSB) removable for a free-float handguard?
A: The front sight base is a standard A2 FSB pinned to the barrel. Removal requires specialized tools and is not a simple drop-in operation. Most choose to work with the classic handguards or install a drop-in free-float tube that fits around the existing FSB.
Q: What kind of accuracy can I expect?
A: With the 1:7 twist barrel stabilizing heavier bullets well and quality ammunition, 1.5 to 2.5 MOA (Minute of Angle) is a realistic expectation with iron sights. Potential accuracy is often better than the shooter—a good optic and match-grade ammo can tighten those groups significantly.
If the classic profile, proven performance, and Colt legacy align with what you’re looking for in a rifle, this AR-15A4 represents a solid value in a historically authentic package. See full details and availability on our site.
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