When your job is to serve and protect and your life is on the line, count on the Smith & Wesson M&P15, the latest standard in reliability. Each model is chambered in 5.56mm NATO/.223 Remington and offers: a 6-position telescopic stock with dual sling attachments, dual-position front sling swivels, a fully-adjustable front post sight, a mil-spec flash suppressor compensator, a chrome-lined 4140 steel barrel with a 1 in 9" twist, a 7075 T6 aluminum receiver, and a hard-coat black anodized finish. Additional features include a chrome-lined gas key and bolt carrier and a Thermo-Set M4 handguard. The Sport model has an adjustable A2 post front sight and a Magpul folding MBUS. This model has a bullet button for California compliance.