For some of us the watchword is ‘sometimes you need a .308.’ The .223/5.56mm platform is a wonderful close-quarters combat system and may be accurate at extended range. However, the punch needed for some chores just isn’t there. There are shooters that hunt medium game, use a rifle for defense, or like long-range shooting and are limited by the .223 Remington cartridge. Most of us feel that jumping over the 6.8 or the .300 Blackout straight to the .308 makes sense.
The—6.8 as an example—replaces the 5.56mm, while those of us that use the .308 also have on hand a good .223 Remington. However, we like AR-15 handling and sometimes we like the commonality of handling between the .223 and .308. (And even a good .22!) A good quality AR-15-type rifle chambered for the hard-hitting .308 Winchester cartridge makes sense. The M&P10 is a great all around rifle chambered for the potent .308 Winchester cartridge.
Handling was excellent as may be expected from an AR-15-type rifle. The flat top receiver accepts any practical optic. The rifle is an AR-15-type with forward assist, standard firing handle and the same magazine and slide lock release we have come to know and love with the AR-15. I replaced the stock with a Mission First Tactical stock. This is simply personal custom fitting to the shooter. The handguard is all AR-15.
The receiver, buffer tube, and telescoping stock are familiar to AR-15 shooters around the world. You may modify the rifle as you see fit. I like it as issued, but if long-range shooting is in the cards, you may wish to add good optics and a custom grade forend. Interestingly, this isn’t really a copy of the original AR-10 at all, but rather a modified AR-15. The rear of the bolt is AR-15 size as an example, while the front of the carrier is .308 size. It works out well. There is an improved firing pin spring that may counter slam fires with the floating firing pin. I cannot confirm, but it looks good.
Slam fires are most common with poorly-sized handloads or protruding primers. Never place a cartridge in the chamber and then allow the bolt to slam shut. Always load from the magazine. The Smith & Wesson Military and Police 10 has a couple of other advantages over most any other AR-type rifle. The Smith & Wesson features an ambidextrous safety. When training, I do not consider one hand the right hand and the other the left. Rather, I shoot with the rear hand on the handle and the forward hand controlling the rifle. Right- or left-hand operation depends upon the obstacle and the firing position.
The barrel isn’t a heavy barrel but is adequate for the task. The barrel twist rate is 1:10 inches, which proved capable of stabilizing the loads fired with good accuracy. These loads included not only the Winchester USA 147-grain .308 but also the Winchester 150-grain JSP and the Winchester 180-grain JSP. Accuracy was good to excellent, with 2-2.5-inch groups at 100 yards with iron sights. Of course, the rifle will do better once there are proper optics mounted. There have been no failures to feed, chamber fire or eject with a variety of loads including handloads. The rifle has proven reliable with bullet weights of 147 to 180 grains including handloads using the Sierra MatchKing (SMK) in both 168- and 175-grain weight.
When firing and handling the rifle, there are several advantages over other short .308 rifles that come to mind. First, the rifle kicks less than most bolt-action rifles. This is because of the gas operated action. The action soaks up and uses recoil energy. Second, the ergonomics of the rifle are excellent for all around recoil control. The rifle is reliable. If you need the extra punch of the .308 in the AR-15 platform, this is a great rifle. If you are hunting with a .308 bolt gun and wish to try the AR-15, this is a good place to start. The Smith & Wesson rifle is a good show, with quality, accuracy and reliability.
Short, soft recoil and extra punch — what’s not to like about the M&P .308? Share your impression, or first hand experience, of the Smith and Wesson M&P .308 in the comment section.
Bob Campbell is a former peace officer and published author with over 40 years combined shooting and police and security experience. Bob holds a degree in Criminal Justice. Bob is the author of the books, The Handgun in Personal Defense, Holsters for Combat and Concealed Carry, The 1911 Automatic Pistol, The Gun Digest Book of Personal Protection and Home Defense, The Shooters Guide to the 1911, The Hunter and the Hunted, and The Complete Illustrated Manual of Handgun Skills. His latest book is Dealing with the Great Ammo Shortage. He is also a regular contributor to Gun Tests, American Gunsmith, Small Arms Review, Gun Digest, Concealed Carry Magazine, Knife World, Women and Guns, Handloader and other publications. Bob is well-known for his firearm testing.
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