carrier and buffer system are available to let the HK416 fire safely as quickly as possible after being submerged in liquids like water. To reduce the risk of slam-firing, the HK416 features a proprietary firing pin safety in the bolt. This firing pin safety limits the HK416 upper to working with standard AR-15 type full height hammers in the fire control group of the lower. Adoption In July 2007, the U.S. Army announced a limited competition between the M4 carbine, FN SCAR, HK416, and the previously-shelved HK XM8. Ten examples of each of the four competitors were involved. Each weapon fired 60,000 rounds in an extreme dust environment. The shoot-off was for assessing future needs, not to select a replacement for the M4. The XM8 scored the best, with only 127 stoppages in 60,000 total rounds, the FN SCAR Light had 226 stoppages, while the HK416 had 233 stoppages. The M4 carbine scored "significantly worse" than the rest of the field with 882 stoppages. However, magazine failures caused 239 of the M4's 882 failures. Army officials said, in December 2007, that the new magazines could be combat-ready by spring of 2008 if testing went well. In December 2009, a modified version of the HK416 was selected for the final testing in the Infantry Automatic Rifle program, designed to partially replace the M249 light machine gun at the squad level for the United States Marine Corps. It beat the three other finalists by FN Herstal and Colt Defense. In July 2010, the HK416 IAR was designated as the M27 and 450 were procured for additional testing. The Turkish company Makina ve Kimya Endustrisi Kurumu ("Mechanical and Chemical Industry Corporation") has considered manufacturing a copy of the HK416 as the MKEK Mehmetçik-1 for the Turkish Armed Forces. Instead, the new MPT-76 rifle has been developed by KALEKALIP with MKEK as the producer, with the Mehmetçik-1 dropped from adoption into the Turkish military. The French Armed Forces conducted a rifle evaluation and trial to replace the FAMAS, and selected the HK416F as its primary firearm in 2016. Of the 93,080 rifles, 54,575 will be a "short" version with a barrel weighing without the ability to use a grenade launcher, and 38,505 will be a "standard" version with a barrel weighing , of which 14,915 will take FÉLIN attachments; standard rifles will be supplied with 10,767 HK269F grenade launchers. 5,000 units are supposed to