SIG Sauer SIG522 Classic .22 LR Semi-Auto Rifle, 16 in Threaded Barrel, Folding Adjustable Stock, Williams Aperture Rear Sight, 25+1 Capacity
The SIG Sauer SIG522 Classic is a .22 LR trainer patterned on the SIG 55x/556 platform, produced roughly 2009–2015. This USA-marked example features a 7075-T6 aluminum upper, polymer lower, a 16-inch threaded barrel with a birdcage flash hider, and the left-side SIG 55x-style charging handle. It comes well-equipped with six factory-pattern magazines and a SIG Sauer model-labeled hard case.
An integral full-length Picatinny top rail, fixed tower front sight, and Williams adjustable aperture rear sight provide a versatile sighting setup. The folding, skeletonized polymer stock adjusts for length of pull, and the ribbed, vented polymer handguard completes the 55x-inspired configuration. Capacity is noted at 25+1 with compatible magazines.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Details: This firearm is in solid functional shape. There are scratches and blemishes present.
What’s Included
- SIG Sauer factory hard case (model-labeled)
- 4x 25-round SIG522-pattern polymer magazines (curved extended)
- 2x 10-round SIG522-pattern polymer magazines (shorter box type)
Designed as a dedicated .22 LR trainer, the SIG522 Classic mirrors the handling cues of the SIG 55x/556 with a left-side, SIG 55x-style charging handle and a two-position safety selector. It uses a semi-automatic blowback action tailored to rimfire while keeping familiar controls.
Construction combines a 7075-T6 aluminum upper receiver with a polymer lower. Markings include "SIG522, SIG SAUER INC., EXETER, NH, USA" on the upper and ".22 LR" on the barrel. The series uses a nonfunctional gas-block/front-sight assembly typical of the SIG522 line for the correct profile.
The 16-inch barrel is threaded and fitted with a birdcage flash hider. Sighting is handled by a fixed tower front and a Williams adjustable aperture rear, with an integral full-length Picatinny top rail for mounting sights along the receiver line.
Furniture includes a ribbed, vented polymer handguard, a SIG SAUER polymer pistol grip, and a folding, skeletonized polymer stock with an approximate length-of-pull range of 11.5–13.5 inches. Capacity is listed at 25+1, and this rifle ships with a mix of 25-round and 10-round SIG522-pattern magazines.