H&K M27.

The M27 Infantry Automatic Rifle is a variant of the HK416. The HK416 was originally developed by Heckler & Koch for U.S. special operations forces as a major product improvement of M4/M16-type carbines and rifles. Using the HK-proprietary gas piston system found on the company’s G36 rifle, the HK416 prevents propellant gases and carbon from fouling the weapon’s interior, making it the most reliable of any M4/M16type weapon. During the last decade, the HK416 has been combat-proven in Southwest Asia and has also gained the attention of military, law enforcement, and security users outside of the U.S. In April 2007, the HK416 was selected as the new Norwegian Army rifle. The HK operating system, as well as other improvements made to various components and parts ensure reliability and performance in all scenarios, with all types of ammunition, with all barrel lengths, and with and without sound suppressors attached. An innovative free-floating four-quadrant rail system/ handguard designed by HK allows all current accessories, sights, lights, and aimers used on M4/M16-type weapons to be fitted to the HK416. This HK rail system handguard can be installed and removed without tools. The HK416 uses barrels produced by Heckler & Koch’s famous cold hammer forging process. The highest quality steel is used in this unique manufacturing process producing a barrel that provides superior performance with minimal degradation of accuracy and muzzle velocity even after thousands of rounds are fired. Many HK416 variants also have “OTB” (over-the-beach) features and can be safely fired after being submerged in water and not completely drained. In addition to the improvements in the baseline weapon, HK has produced corrosion resistant steel and polymer magazines and a proprietary buffer to further enhance functional reliability. Weight 8.16 pounds (weapon only). Approximately 12.67 pounds (weapon, 30-round loaded magazine, accessories including: iron sights, SDO-optic, PEQ-16, VCAS sling, QD 9-13” bipod, vertical foregrip, and rail cover set). Barrel 16.5 inches, cold hammer forged with bayonet lug. Rifling 1 in 7 inches, right-hand twist, 6 grooves. Sights As assigned by USMC — Knights Armament Company 600 meter backup iron sights (BUIS). Optic As assigned by USMC — Trijicon S.D.O., 3.5 x 30 mm, 100 - 1,000 meter reticle with quick. ranging feature and close range Ruggedized Miniature Reflex (RMR). Rail system 1-piece quad (M1913 Picatinny) Free Floating Rail System / 11” length. Buttstock 6-position adjustable with storage space. Operation Air-cooled, gas operated, short stroke piston driven operating rod, firing from a closed bolt. Selector Safe, Semi, Automatic / Ambidextrous. Magazine 30-round U.S. government magazines (HK magazines optional ). Muzzle velocity Approximately 2,900 FPS (with M855 ammunition). Rates of Fire Cyclic: Approximately 700-900 RPM. Sustained: Approximately 36+ RPM. Semi: Approximately 45 RPM. Automatic: Approximately 90+ RPM (3-5 round burst). Accuracy Test guns with 15,000 rounds have fired 2 MOA with M855 ammunition. Single fire Single fire: Less than 4 MOA (averages 2.5 MOA with M855 ammunition). Automatic fire Less than 8 MOA with 5-round burst (averages 5.5 MOA with M855 ammunition).Graduated Range Iron sight graduated effective range: 600 meters. Optic graduated effective range: 1000 meters. Maximum range Approximately 3,545 meters. Barrel life 15,000 rounds minimum. Parts life 10,000 rounds minimum.