Cheytac Intervention M200 / M310

The CheyTac Intervention, also designated M200, is an American bolt-action rifle produced by CheyTac USA and frequently classified as an anti-materiel rifle. Its design derives from the EDM Arms Windrunner. Rather than a rifle alone, the manufacturer marketed it as the CheyTac Long Range Sniper System (LRSS), combining the rifle, purpose-designed ammunition, and a ballistic computer. The .408 CheyTac and .375 CheyTac cartridges were developed specifically for the platform, the projectiles being shaped to balance rotational and linear drag in order to limit yaw and precession and hold the tip aligned with the trajectory.

The M200 is a manually operated rotating-bolt rifle fed from a detachable single-stack box magazine, with cartridges also loadable individually into the chamber. The barrel is free-floating, heavy-fluted, and quickly removable for replacement, storage, or transport; the shroud at its rear carries an integral folding bipod and a carrying handle. A McArthur PGRS-1 muzzle brake is fitted as standard and can be removed and replaced with an OPSINC suppressor. The buttstock collapses and retracts, is adjustable for length of pull, and houses a hinged rear monopod that folds when not in use. The receiver carries a Picatinny rail for optics. Sighting options include the Nightforce NXS 5.5-22x56 telescopic sight or the US Optics SN-9, with an AN/PVS-14 GEN III Pinnacle night vision monocular attached to the day optic through a Monoloc device and an AN/PEQ-2 infrared laser mounted on a titanium strut. The accompanying equipment comprises the CheyTac Advanced Ballistic Computer, Vector IV laser rangefinder binoculars with a digital compass and class 1 eye-safe filters, and a Kestrel 4000 or 4500 NV weather station measuring wind speed, air temperature, air pressure, relative humidity, wind chill, and dew point. The Advanced Ballistic Computer runs on Windows Mobile 2003, draws bullet flight data from high-speed Doppler radar test sessions, and takes input from the Kestrel and the Vector IV; where no Doppler-derived data exists for a given round, it falls back on mathematical ballistic models. Printed data tables are supplied for manual use. Recorded group sizes are 7 to 9 in at 1,000 yd, 10 in at 1,500 yd, 15 in at 2,000 yd, 19 in at 2,100 yd, and 29 in at 2,400 yd, with vertical dispersion remaining under one minute of angle out to 3,000 yd.

Three variants were produced: the standard M200, the M200 Carbine, and the M200 CIV. The variants differ mainly in barrel length, which governs muzzle velocity and consequently effective range. The M200 CIV was a de-rated civilian version of the military-specification rifle with a shorter effective range; it was discontinued, leaving the fully accurized 29-inch model as the only version offered for sale. The rifle is used by the 601st Special Forces Group of the Czech Republic, by GROM operators in Poland, and by Maroon Berets operators in Turkey. Its availability to civilian purchasers has drawn scrutiny in recent years.