Description
You’re on a property line, the sun is low, and the shot is long. The target isn’t paper—it’s a threat that needs to be stopped decisively at a distance where smaller calibers lose their authority. When you need a rifle that bridges the gap between a carbine’s agility and a full-power rifle’s terminal performance, the answer is the Knights Armament SR-25 E2 Advanced Combat Carbine, .308 Win, 16″ Barrel, 20rd Mag. This is a purpose-built, battle-proven platform that delivers 7.62x51mm NATO power in a maneuverable, gas-operated package ready for demanding field use.
Look, the SR-25 E2 ACC isn’t a range toy. It’s a professional system engineered for when engagement distances are unpredictable and cover is scarce. The 16-inch chrome-lined barrel provides the ideal balance for the .308 Winchester cartridge—offering substantial velocity and energy retention without the unwieldy length of a traditional rifle. At just over eight and a half pounds unloaded, it handles like a serious fighting carbine, not a benchrest rig. This configuration is drop-in ready for optics, lights, and slings, requiring no gunsmithing to become mission-capable. It ships to Missouri and compliant US states from our network.
Built for the Real World
The heart of the system is the patented KAC gas piston operation. It runs cleaner and cooler than direct impingement, especially with sustained fire. The two-stage match trigger provides a crisp, predictable break essential for precise shots under stress. The URX 4 handguard offers a monolithic top rail for absolute optic stability and ample M-LOK real estate for grips and lasers. Every component, from the ambidextrous controls to the reinforced magazine well, is designed for reliability when it matters most. The rifle accepts SR-25 pattern magazines and is compatible with many aftermarket parts that follow the platform’s established specifications.
Specifications & Details
| Caliber | .308 Winchester / 7.62x51mm NATO |
| Barrel Length | 16 inches |
| Overall Length | 35.5 inches (stock extended) |
| Weight (Unloaded) | 8.6 lbs |
| Magazine Capacity | 20 Rounds (1 included) |
| Operation | Short-stroke gas piston |
Pros & Cons
The Good: Legendary Knights Armament reliability and build quality. The piston system ensures consistent function with minimal maintenance. The .308 cartridge from a 16-inch barrel delivers decisive power at intermediate ranges. The platform is highly adaptable for various roles from defensive use to designated marksman duties.
The Consideration: With a price of $4398.34, this is a significant investment in top-tier capability. Ammunition cost for .308 is higher than 5.56mm, and the rifle’s weight, while balanced, is noticeable compared to an AR-15. It’s a tool for those who need its specific advantages.
Who It’s For
This carbine is for the serious end-user who operates in environments where shot placement and terminal effect are non-negotiable. Think rural homestead defense where shots may exceed 200 yards, or as a patrol vehicle rifle for law enforcement. It’s for the shooter who demands the robustness of a military-spec firearm and understands the value of a system that simply works. That said, it also serves the discerning collector who appreciates owning one of the most respected modern battle rifle platforms available.
Frequently Asked Questions
Q: Is this a true semi-automatic version of the military M110?
A: The SR-25 is the foundational civilian and military pattern. The E2 ACC model shares the core operating system, barrel profile, and reliability of the military systems but is configured as a semi-automatic-only carbine for the commercial market.
Q: Can I use PMAGs or other .308 AR magazines?
A: It uses the SR-25 magazine pattern. While some .308 AR platforms (Armalite pattern) differ, Knights Armament magazines are the standard, and several quality aftermarket manufacturers produce compatible mags. Always verify compatibility before purchase.
Q: What optics are best suited for this rifle?
A: Its versatility allows for various optics. A low-power variable optic (LPVO) in the 1-6x or 1-8x range is an excellent choice for its dual-purpose capability. For more dedicated medium-range work, a 3-9x or similar scope is ideal. A robust mount is critical.
Ready to deploy a system built on a legacy of performance? The Knights Armament SR-25 E2 Advanced Combat Carbine is available at firearms-missouri.com for Missouri residents and nationwide. An FFL transfer is required for firearm purchases.
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