The SIG MPX is a gas-operated submachine gun designed and manufactured by SIG Sauer and is primarily chambered in 9×19mm Parabellum cartridge. It is gas-operated firearm, featuring a closed, rotating bolt. These design features, rare in submachine guns, were chosen to enhance the safety of the user and to have a more reliable firearm. It was designed in 2013 and was released to the general public in 2015. It features the SIG Sauer short stroke push-rod gas system to reduce the recoil and improve the reliability of the weapon. The MPX, in its second generation, features a system that would allow for conversion from 9mm to .357 SIG or .40 S&W. SIG Sauer also used the same gas piston system to develop the SIG MCX carbine.
Firing the long-range, hard-hitting 7.62x51mm NATO/308 Winchester cartridge, the selective-fire FN SCAR 17’s innovative gas-operated, short-stroke piston system reduces fouling for greater reliability.
The FN SCAR 17 system features three user-interchangeable, free-floating cold hammer-forged MILSPEC barrels with chrome-lined bores. Fully ambidextrous operating controls instantly adapt the FN SCAR 17 to any user. The receiver-integrated MIL-STD-1913 optical rail plus three accessory rails enable mounting of a wide variety of tactical lights and lasers. The side-folding polymer stock is fully adjustable for comb height, length of pull, and is colored authentic Flat Dark Earth (FDE).
The FN® M240 family of medium machine guns (7.62x51mm NATO) has long been employed by all services of the U.S. Armed Forces. The FN M240B is the “go to/can do” medium machine gun for all branches of the U.S. military, offering absolute reliability, extended range, and an exceptional service life. This weapon’s high volume of fire makes it the principal suppressive fire instrument for the infantry platoon and company. The M240 is one of the most essential and widely used small arms in Iraq and Afghanistan. The M240 B’s cold hammer-forged MIL-SPEC barrel has a hard-chromed bore for longer life and improved accuracy. The receiver is machined steel and is equipped with a top-mounted MIL-STD1913 optical rail. The cross-bolt safety and curved trigger help enhance operator control.
The M4A1 is a fully automatic variant of the M4 carbine – a shorter and lighter variant of the M16. It went into service in 1994 to replace the M16 in certain roles. The M4A1 trigger group operates on either Safe, Semi-Automatic, or Fully Automatic settings. Cartridges are the 5.56x45mm (.223) NATO cartridge that is magazine fed. Firing is achieved via a direct impingement gas operating system. It is primarily used by special operations.
When originally designed, the M1 carbine was intended to have only selective-fire capabilities. When actual production on the gun began, the decision was made to not include that feature. Full automatic fire capabilities were included in the design of the M2 carbine, an upgraded selective-fire version of the M1 released in 1944. The M2 included improvements to the rear sight, the addition of a bayonet lug and other improvements off of the M1 design. This is a late WWII M1 Carbine as manufactured by Winchester that was subsequently converted to the fully automatic M2 configuration. The upgrade was considered a success, however, there were tradeoffs. The M2 included a heavier 30-round magazine which put greater strain on the magazine catch. This necessitated the development of a studier catch. This further required a modification on the slide, sear and stock. When engaged in full automatic fire, the T4 model could shoot off 750 rounds a minute while generating a manageable recoil. While many carbines were manufactured as M2s the only real difference between the M1 and M2s was the fire control group they belonged to. The military issued soldiers field conversion kits (T17 and T18) to easily convert M1s into serviceable M2s. History looks back upon the M2 carbine as an anomaly of sorts. Historians to this day debate and struggle as to how best categorize the M2 carbine. More powerful than a submachine gun, it can be considered an assault rifle.
