HK 417 | DESIGNATED MARKSMAN RIFLE
The 16" 'recce' HK417 is used in New Hayesalian service in the designated marksman role. The HK417, equipped as standard with the Spectre TR optical sights and Harris HBR bipod, is renown for it's long range and exceptional accuracy.
The HK417 is similar in internal design to the HK416 - familiar to the common M4 platform - but the receiver and working parts are enlarged to suit the larger 7.62×51mm NATO round. The bolt is a seven-lug rotating type, which sits in a bolt carrier and operates in a forged alloy receiver resembling those of the Stoner-designed AR-10, AR-15 and M16 rifle series weapons.
Like the HK416, the HK417 is gas-operated with a short-stroke piston design similar to that of the Heckler & Koch G36. The short-stroke piston is more reliable than the original direct impingement operation of the AR-15 design because, unlike these weapons, it does not vent propellant gases directly into the receiver, which deposits carbon fouling onto the bolt mechanism as well as heating it up.
The early prototype HK417 used 20-round magazines from the Heckler & Koch G3 rifle family, which did not feature a bolt hold-open device. Later prototypes, however, switched to a polymer magazine with bolt hold-open. The magazine resembles an enlarged version of the G36 series transparent magazine, except without the pins for holding more than one magazine together. In addition, a 50-round, low profile drum magazine developed by HK for the HK21E machine gun can be fitted to the HK417 for use in support and sustained fire applications. In New Hayesalia, the PMAG series of ploymer magazines are in use.
The HK417 is issued commonly to Joint Fires Observers, Designated Marksmen, and Spotters assigned to sniper teams.