The M4/M4A1 5.56mm Carbine is a lightweight, gas operated, air cooled, magazine fed, selective rate, shoulder fired weapon with a collapsible stock. It is now the standard issue firearm for most ...

Marine Corps Systems Command on Thursday announced ... for use on the Corps’ arsenal of M27 Infantry Automatic Rifles, M4 carbines, and M4A1 Close Quarter Battle Weapons. In an email to Task ...

Marine Corps Systems Command is purchasing M27 Infantry Automatic Rifles from a single source vendor based on feedback from Marines. Here's how it stacks up against the M4 By Task & Purpose Posted ...

It works with the M4 Carbine, the M249 machine gun, and the H&K and M16A2 rifles. It is suitable for use in most weapons with a 1-in-7 barrel twist. The M855A1 has a copper-jacketed steel core ...