McMillan TAC-50

The McMillan TAC-50 is based on previous designs from McMillan that first appeared during the late 1980s. McMillan Firearms manufactures the weapon system in Phoenix, Arizona, United States. Production and service of the rifle began in 2000.

The weapon is a manually operated, rotary bolt-action system. The bolt features dual front locking lugs and spiral fluting along its body to reduce weight. It uses a heavy, fluted match-grade Lilja barrel equipped with a muzzle brake. Ammunition is fed from a detachable box magazine. The fiberglass stock is designed for bipod-supported firing, with a removable buttstock that utilizes rubber spacers for length of pull adjustments. The rifle has no open sights and is configured for telescopic or night optics. Standard optical sights utilized with the rifle include the Leupold Mark 4 16x40mm LR/T M1, the Schmidt & Bender 5-25×56 PMII, and the Nightforce NXS 8-32x56 Mil-dot telescopic sight.

The rifle entered service in 2000 and has been deployed in the War in Afghanistan and the War in Iraq. Adopting nations include Canada, where the Canadian Army designated the initial model as the C15 Long-Range Sniper Weapon, later upgrading it to the C15A1 and C15A2 configurations. The United States Navy SEALs employ the system under the designation Mk 15. Additional operators include military and special operations forces from France, Georgia, Israel, Jordan, South Africa, Turkey, and Ukraine. Canadian special forces personnel have utilized the weapon to achieve record-distance combat engagements.

Variants of the system include the TAC-50A1, introduced in 2012, which features an extended fiberglass stock forend to shift the bipod balance point forward, an integrated cheekpiece, an adjustable monopod, a smaller pistol grip, and a relocated magazine release. The TAC-50A1-R2 variant incorporates a proprietary hydraulic piston in the buttstock to mitigate free recoil. The TAC-50C variant updates the design with a folding Cadex Dual Strike chassis, an adjustable cheekpiece, adjustable length of pull, a smaller pistol grip, and three Picatinny rail sections for accessory mounting.