The

SIG Sauer Several brother companies that design and manufacture firearms use the brand name SIG Sauer . The original company, ''Schweizerische Waggon-Fabrik'' (SWF), later ''Schweizerische Industrie-Gesellschaft'' (SIG), went through several selloffs, ...

522 LR is a .

22 LR The .22 Long Rifle or simply .22 LR or 22 (metric designation: 5.6×15mmR) is a long-established variety of .22 caliber rimfire ammunition originating from the United States. It is used in a wide range of rifles, pistols, revolvers, smoothb ...

semi-automatic, blowback operated

rifle A rifle is a long-barreled firearm designed for accurate shooting, with a barrel that has a helical pattern of grooves ( rifling) cut into the bore wall. In keeping with their focus on accuracy, rifles are typically designed to be held with ...

. It is patterned after the SIG 55x series rifles that fire 5.56x45mm centerfire cartridges. The 522 fires .22 LR ammunition and serves as a training rifle for its larger counterparts due to mostly identical controls and features. It differs from its centerfire counterpart in a number of ways. The 522 series has no adjustable gas block as the 55x series does. Instead, a mock gas block is installed. SIG refers to this as a storage container. Instead of 30-round magazines, the 522 series accepts 10-round or 25-round magazines that are manufactured by Black Dog Machine and re-branded for distribution with the SIG 522. Black Dog also produces a 50 round drum magazine for the 522.

Variants

522 Classic

The SIG 522 Classic has a standard polymer handguard,

M1913 The Picatinny rail ( or ), or Pic rail for short, also known as a MIL-STD-1913 rail, 1913 rail or STANAG 2324 rail (cancelled), is a military standard rail interface system that provides a mounting platform for firearm accessories. It was or ...

Picatinny rail The Picatinny rail ( or ), or Pic rail for short, also known as a MIL-STD-1913 rail, 1913 rail or STANAG 2324 rail (cancelled), is a military standard rail interface system that provides a mounting platform for firearm accessories. It was o ...

on top of the receiver, and folding and telescoping stock. A flash hider modeled after the

M16A2 The M16 rifle (officially designated Rifle, Caliber 5.56 mm, M16) is a family of military rifles adapted from the ArmaLite AR-15 rifle for the United States military. The original M16 rifle was a 5.56×45mm automatic rifle with a 20-roun ...

style "Bird Cage" flash suppressor is installed. Options include

iron sights and a SIG-branded mini red dot sight that mounts on top of the Picatinny rail. Barrel length is , and weight is .

522 SWAT

SIG's 522 SWAT differs from the base classic model by adding a full length Picatinny quad rail forward stock. Weight is 2.9 kg, and the SWAT has the same flash hider as the Classic.

522 Commando

The 522 Commando features a folding stock and mock suppressor mounted to 1/2 × 28 TPI threads. It has the standard non-railed polymer handguards. It weighs .

522 SWAT Commando

The 522 SWAT Commando features the same mock suppressor mounted to the 522 Commando, but adds a shorter version of the SWAT's aluminum railed front end. It weighs the same as the 522 Commando at 2.78 kg.

522 Target

The newest in the 522 lineup, the

522 Target has an aluminum tube front end that is free floated from the barrel to increase accuracy. It is equipped with a variable power scope mounted to the top Picatinny rail and a barrel. It weighs about .

References

{{Reflist .22 LR semi-automatic rifles Rifles of Germany SIG Sauer rifles