ще се повтаряме като папагали ако трябва докато се разбере
М27 е фул версия на HK
източник:
https://en.wikipedia.org/wiki/M27_Infan ... atic_RifleThe M27 Infantry Automatic Rifle (IAR) is a lightweight magazine-fed 5.56mm select-fire weapon based on the HK416 rifle designed and manufactured by the German company Heckler & Koch. It is used by the United States Marine Corps (USMC) and is intended to enhance an automatic rifleman's maneuverability. The USMC initially planned to purchase 6,500 M27s to replace a portion of the M249 light machine guns employed by automatic riflemen within Infantry and Light Armored Reconnaissance Battalions. Approximately 8,000–10,000 M249s will remain in service with the Marine Corps to be used at the discretion of company commanders. In December 2017, the Marine Corps announced that it would equip every member of an infantry squad with the M27.[5]
Why the M27 IAR Is NOT the Right Rifle for the Marine Corps
https://www.thefirearmblog.com/blog/201 ... ine-corps/One area where a new rifle might improve over the M27 is in the bolt and gas system configuration. Our source told TFB that with M855A1, the M27 achieved an average bolt life (measured to the first lug shearing off) in official high round count tests of 6,000-7,000 rounds, and a barrel life (measured to 200 ft/s velocity loss) of 9,000-10,000 rounds. In those same tests, the M4A1 achieved a barrel life of just 7,000 rounds due to its inferior steel and construction (though the carbines continued to group well for thousands more rounds). However, the M4A1 Carbine beat the M27 in bolt life, with an average of 9,000 rounds before lug shear. One M4 bolt even went 13,000 rounds before its first lug sheared! As I will elaborate below, this disparity in bolt life is the result of something peculiar and inherent to the M27’s design, and it would therefore take considerable time, effort and money via extensive equipment change proposals (ECPs) to rectify the problem. For the M4 Carbine, however, even better bolt life than current could be achieved via simple drop-in upgrades and improvements at very low cost.
и още .. за четене
The Big M4 Myth: ‘Fouling caused by the direct impingement gas system makes the M4/M4A1 Carbine unreliable.’
http://www.defensereview.com/the-big-m4 ... nreliable/използва по тежка пружина на Спринко и пружина за екстрактор с 5 намотки
за да докаже теорията си, че по-тежък буфер и пружина с повишено напрежение на екстрактора ще дадат изключителна надеждност без смазване или поддръжка изобщо.
или М4 е цев с технология от Втората световна война .. и изкарва повече от топ немско качество на цев и изработка
ами .. едното млати с чука .. и напред и назад, а другото .. с газ, въздух ?
инджинерно е ясно, че тази с газ ще е по точна и ще изкара повече
чука .. млати желязо в желязо, тежка, скъпа, нестандартни части .. но с яка корупция е лансирана в УС Арми ..
да де .. но днес има много много подобрения на М4/АР15 вече
както и свободно плаваща цев .. просто разкарваш тази фиксирана мишка и си правиш газовата свободно плащава