M27 IAR (including M38 SPR)
M27 IAR (including M38 SPR) Caliber : 5.56 × 45mm NATO HK 's sample gun for the US Marine Corps' IAR competition is the HK416 with a 16.5-inch (about 420mm) barrel. Unlike other IAR sample guns, HK IAR does not have other special improvements (such as two firing modes like FN IAR , or a large heat sink like Colt IAR ). However, HK IAR is the lightest among all competing models, weighing 7.9 pounds (about 3.6kg) when empty, and the operation is the same as M16 . Ordinary soldiers do not need special training to master it, because HK simply directly took out one of the carbine models of HK416 to participate in the bidding. According to the Marine Corps Times on December 2, 2009 , HK IAR won the bid in this project. In May 2010, HK IAR was officially designated as M27 and has begun to be delivered to troops for trial. The Marine Corps does not require the IAR to have a quick barrel replacement function. The US military has always believed that machine guns must be able to...