SIG Sauer P320

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Description

SIG Sauer P320

The SIG Sauer P320 is a semi-automatic pistol produced by Sig Sauer, Inc. in Exeter , New Hampshire , USA and SIG Sauer GMBH in Eckernförde , Germany . The SIG Sauer P320 can be chambered in 9 ×  19mm Parabellum (referred to here simply as ”  9mm  “), .357 SIG , .40 S&W , and .45 ACP . Handguns in caliber 9  mm, .357 SIG, and .40 S&W can be easily converted. Conversion from .357 Sig to .40 S&W only requires a barrel change, those from  9mm to .357 Sig or .40 S&W and vice versa are done using conversion kits.

The 9 × 19 mm Parabellum chambered P320  was introduced to the North American market on, followed by the .45 ACP compact model at the SHOT Show in. The P320 is a development of the SIG Sauer P250, which operates in double action . The, a modified version of the P320 has been adopted by the US military as a new regulatory handgun. The model with a standard size barrel is referred to in the United States under the reference “M17” while a more compact version is referred to as “M18”

Characteristics 

A key feature of this gun is its modular design. The main module of the P320 is an internal stainless steelassembly , the fire control unit, which integrates the trigger , the ambidextrous breech stop (one on each side of the pistol), the ejector and four slides as well. than an external security system. The fire control unit allows the operator to swap out different sizes of high-end slides or modules and polymer handles.

The serial number is also on the fire control unit instead of the handle.

Choice of caliber and handle 

Each of the three calibers, 9 × 19  mm Parabellum , .357 SIG , and .40 S&W , can be modified using modification kits, and are available in four barrel lengths. In addition to the base P320, RX series models with integrated optical sights are available. Another variation of the P320 is the X Series. RX functionality is also available for standard models through retrofit kits. These parts are not numbered and can be sold and delivered without restriction. The barrels chambered in .357 Sig and .40 S&W allow a change of caliber by simply exchanging the barrel.

The P320 is available in four sizes, “Full” (standard), “Carry”, “Compact”, and “Sub-compact”. The grip adapts to the length of the weapon, three sizes of interchangeable pads are available: large, medium, and small. The X series handles can also be interchanged with the standard handles, only the .45 caliber ACP handle is not interchangeable with the others due to the size of the magazine.

Fire / serialization control

The firearms serial number, which is used for registration and tracking by the government, is not changeable with respect to registration and is indeed representative of the firearm regardless frame or handle size attached to it. The Fire Control Unit (FCU) includes the trip unit, attacker, disconnector, and security mechanisms. It is, indeed, the heart of the firearm, while all interchangeable barrels, slides, recuperator springs, grips, and magazines are merely accessories and are not subject to restrictions and registration (according to the laws American). The ability to change gauge, size, image and grip size is the essence of the modular construction system.

The P320 has been designed to be ambidextrous in use, with an ambidextrous slide and a reversible magazine release lever. All other operating controls are designed so that they can be used from either side. The weapon can be disassembled easily, without tools. In addition, the weapon can also be disassembled without pressing the trigger, an additional safety feature to prevent a shot starting by mistake or neglect.

Standard, Carry, and Compact size models feature a Picatinny rail mounted under the barrel for mounting a laser sight, tactical flashlight, or other accessories.

Caliber Change Kits

The manufacturer offers caliber modification kits (the ”  Caliber X-Change kits  “) composed of a slide, the recoil device, the barrel, the grip module, and the magazine (s) to the caliber in which the P320 pistol is adapted. These kits allow the user to switch between different configurations without tools. There is also a caliber change kit which allows the mounting of the Optical Reflex sight system on the RX.

Recoil mechanism 

Like other SIG Sauer pistols, the P320 is a pistol operated by short recoil , by locking the breech. It uses the Sig Sauer Barrel Cam System, which snaps into the ejection window on the slide.

Slide

The blade is made of stainless steel and is often finished in a black finishing sole: Nitron. The slide contains the breechblock, striker, disconnector, ejector, and safety systems. State compliant versions can also mount an external ambidextrous safety lever. Some blades are made for the Romeo1 type optical sight.

Safety mechanisms

The P320 has no manual safety, allowing instant activation without preparation. The use of an automatic safety firing pin combined with a disconnect switch ensures safety when transporting the weapon, as well as the prevention of accidental starts if the pistol falls or is mishandled. As required in some US states, some models come with an external security system.

The Modular Handgun System (MHS) (now known as the “M17”) version of the P320, has ambidextrous thumb safety. The “Law Enforcement” models and military versions can also be equipped with safety trigger tabs on request.

Trigger system

The trigger is a pre-stressed double action system . The starting pressure is approximately 5.5  lbs,28.95.

The trigger tail of the P320 is available in standard or miter version (with safety system).

Ammunition

The pistol has magazines with a capacity of six to twenty-one rounds, depending on the caliber (9 × 19  mm Parabellum, .357 Sig, .40 S&W, or .45 ACP) and the size of the model.

Modular system XM17 handgun

When the tender requirements for a new US Army handgun, known as XM17, were formulated, one of the principles enunciated was that of an already existing weapon with a modular system. . Sig Sauer submitted his P320 with a number of modifications.

The changes include:

  • Slider to facilitate the addition of a red dot sight (RX Series slider);
  • Ambidextrous safety;
  • A charged room indicator;
  • Improvement of the slide;
  • Improvement of the “ mud flap  ” trigger  to prevent the entry of foreign bodies;
  • 4.7 “(120 mm) length for the barrel in standard size M17;
  • 3.9 “(98 mm) length of the M18 compact barrel;
  • chambered in 9 × 19  mm Parabellum (can be adapted for larger calibers like .357 SIG and .40 S&W )
  • Pistols chambered in 9  mm with a magazine of 17 rounds as standard, and an extended magazine for 21 rounds as an option.

The , it is announced that the SIG Sauer P320 MHS (Modular Handgun System) has won the contract following tests by the United States Army. The P320 will be known as “M17” (full size version) and “M18” (compact version) in the US armed forces. If the caliber remains 9 × 19  mmParabellum rather than a larger caliber, the contract allows the services to equip themselves with Sig Sauer XM1152 Full Metal Jacket and XM1153 “special” ammunition . The chosen ammunition is the Winchester jacketed hollow point.

In The American Land Army announced that the first unit to receive the M17 would be the 101  Airborne Division at the end of 2017. At the same time, the other components of the armed forces have also revealed the intention of acquiring it, making the P320 the standard handgun for the entire U.S. military. The delivery of 421,000 pistols in total is announced: 195,000 for the Army, 130,000 for the Air Force , 61,000 for the Navy (compact version XM18 only), and 35,000 for the Marines . TheThe soldiers of the 101  Airborne received first XM17 and XM18, with over 2000 units delivered.

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