Smith & Wesson M&P15 5.56 NATO AR-15 Rifle | 16" Chrome-Lined Barrel, SU Prefix
This Smith & Wesson M&P15 combines the company's proven AR-15 engineering with a chrome-lined 16" barrel and later SU-prefix production. The result is a dependable, U.S.-made carbine that offers durability upgrades uncommon in its class, including a chrome-lined bore and chamber, a hard-coat anodized 7075-T6 aluminum receiver, and a flat-top upper with T-marked Picatinny rail for easy optic mounting.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Rifling Condition: Excellent Rifling - Sharp lands and grooves.
Minimal markings are visible on the receiver and handguard, and the chrome-lined bore remains bright and clean.
What's Included
- Smith & Wesson M&P15 semi-automatic rifle
- Magpul MBUS folding rear aperture sight (installed)
- 1 × 30-round Magpul PMAG polymer magazine
Smith & Wesson launched the M&P15 line in 2006 as its first in-house AR-15 platform, and this SU-prefix example reflects a later production run with incremental refinements.
The 16" 4140 steel barrel features a chrome-lined bore and chamber for enhanced corrosion resistance and easier maintenance. A government profile balances rigidity with weight, while 1/2-28 threads accept common muzzle devices. The 1:9 twist rate stabilizes a wide range of 55- to 69-grain 5.56 NATO and .223 Remington loads.
Its flat-top upper receiver is T-marked for repeatable optic placement and pairs with a fixed A2 front sight post and the included Magpul MBUS folding rear sight. This setup lets shooters run iron sights alone or seamlessly add optics without interference.
A six-position telescoping stock, A2-style pistol grip, and two-piece polymer carbine handguard provide familiar ergonomics and straightforward parts compatibility. The direct-impingement action is fed by standard AR magazines, and one 30-round Magpul PMAG is included.
Constructed from 7075-T6 aluminum with a hard-coat anodized matte black finish, the receiver set delivers mil-spec strength while resisting wear from regular field use.