Knight’s Armament SR-25: The AR-10 Refined

by
posted on February 23, 2022
** When you buy products through the links on our site, we may earn a commission that supports NRA's mission to protect, preserve and defend the Second Amendment. **
Knight's Armament SR-25 Rifle right-side view black metal plastic gun

Eugene Stoner created the AR-15 and AR-10 at Armalite. Rights to the cutting-edge designs were sold to Colt’s Manufacturing, which concentrated its efforts on the smaller-caliber AR-15, giving it the polish and refinement that led to U.S. military officially fielding a version as the M-16. The bigger brother didn’t gain the same amount of attention, though, despite its formidable 7.62 mm NATO chambering.

In 1974 C. Reed Knight, a friend of Stoner, founded the Knight’s Armament Company. The pair worked together during the 1990s, combining the most heralded assets of the AR-15 with the fight-stopping performance of the AR-10. The result was the SR-25—short for Stoner Rifle, with 25 being the sum of the numbers in AR-10 and AR-15.

It didn’t take the U.S. military long to recognize the virtues of the heavier, more-accurate-at-distance firearm. In May 2000, the U.S. Special Operations Command adopted it as the Mk 11 Mod 0. Engagements in the Global War Against Terror evolved, though, and improvements to the platform helped address they changing environment. Today the fielded M110 Semi-Automatic Sniper System (SASS) is still an SR-25, but with further refinement.

Knight’s Armament, based in Titusville, Fla., offers three commercial versions of that famed SR-25. Like their military counterparts, all are semi-automatic, use 20-round magazines and wear all the best assets of an AR-15. Each are chambered for 7.62 mm NATO and .308 Win. Barrels are hammer forged, chrome lined and have a 1:10" rate of twist.

The SR-25 CC M-LOK (Combat Carbine) and SR-25 PC M-LOK (Precision Carbine) have 16" barrels, come with two-stage triggers and M-Lok fore-end for accessory mounting. The latter, however, has 5R cut rifling.  A 20" barrel with 5R rifling comes with the SR-25 PR M-LOK (Precision Rifle) model.

All have the company’s E2 bolt with dual ejectors for increased ejection force and redundant reliability. Fire controls throughout the entire line are bilateral.

The company doesn’t publish MSRPs, but a search and the Internet found most well-established dealers are offering new carbine versions at just under $5,000.

Latest

Colt-Burgess Rifle
Colt-Burgess Rifle

I Have This Old Gun: Colt-Burgess Rifle

There was a time when firearm manufacturers were primarily known for producing only one specific type of gun. In fact, their fame, reputations and, often, their fortunes hinged upon it.

2026 NRA Youth Education Summit Applications Open

Applications are now open for the 2026 NRA Youth Education Summit (Y.E.S.), an all-expenses-paid, six-day leadership and scholarship program for rising high school juniors and seniors.

The Rifleman Report: The Misrepresented Armed Citizen

Despite what mainstream news outlets would have us believe, most armed citizens are thoughtful, deliberate, responsible Americans whose foremost concerns are the well-being of themselves and their families.

First Breach Ammunition Factory Tour

An ambitious and technically savvy startup embarks on the goal to bring match-grade cartridges to the market at an enviable price—all made in America.

The Armed Citizen® Oct. 27, 2025

Read today's "The Armed Citizen" entry for real stories of law-abiding citizens, past and present, who used their firearms to save lives.

The Development of MIM Cartridge Cases

We recently caught up with Concurrent Technologies to learn more about its latest advancements in metal injection molding (MIM) as it pertains to cartridge case manufacturing.

Interests



Get the best of American Rifleman delivered to your inbox.