Dating a recon marine
A more sound approach would be to leverage the competitive environment to procure something better, lighter, and cheaper.
Tags: ***, 5.56mm, carbine, future, h and k, h und k, H&K, heckler, iar, infantry automatic rifle, interim, koch, m16, m16a4, m4, m4a1, m4a1 .
urg, next generation, rifle, surg, upgrade, upper receiver group Since its introduction in 2009, the Marine Corps’ M27 Infantry Automatic Rifle has proven itself as an effective support weapon that offers more firepower and range than the Corps’ other squad level weapons, the M4 Carbine and M16A4 Rifle.
To start, versus the M4 Carbine and M16A4 Rifle, the M27 IAR has a superior barrel and handguard system.
The M4 Carbine’s barrel is made of the same 4150 steel (a low grade chome-molybdenium steel) that has been the military standard since World War II.
Since then, the HK416 has greeted the wider market largely as a carbine-length-barreled true assault rifle, but it has always retained the original gas system design of the short barreled variant.
This has led to an “overgassed” situation, resulting in high cyclic rates and increased wear, a situation which is exacerbated by the rifle’s short-stroke piston-driven operating rod system.
To achieve the reliability needed, Heckler & Koch dramatically increased the gas flow to the HK416’s short-stroke piston.
This improved reliability with the 10.5″ barrels and H&K “Navy” steel magazines of the original requirement.
The reason for the M27’s lackluster bolt life has to do with its gas system.
From its inception, the HK416 (the family to which the M27 belongs) was designed as a short-barreled rifle, an industry-driven effort to create an alternative to the early Mk.18 Close Quarters Battle Receiver.
These material characteristics, especially the heat treat, give the barrel exceptional life and accuracy, and it is easily this factor which is most attractive about the M27.