Sig Sauer SIG522 Classic .22 LR Semi-Auto Rifle, 16.6 in Threaded Barrel (1/2x28), Folding Skeleton Stock, Sightmark Red Dot/Laser, Discontinued
This SIG522 Classic is a discontinued, USA-made .22 LR rimfire trainer styled after the SIG 55x/556 family. It features a 16.6-inch threaded barrel with a factory SIG 55x/556-pattern birdcage flash hider, a 7075-T6 aluminum upper with a polymer lower, and an integral Picatinny top rail. It includes a Sightmark reflex red-dot optic with an integrated laser and comes with a 25-round factory magazine.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: Some markings from previous handling and use. The bore is bright and clean.
What's Included
- Sightmark reflex red-dot optic with integrated laser module
- 1x 25-round factory SIG Sauer .22 LR polymer magazine for SIG522
- Clip-on cheek riser for SIG skeleton folding stock (not installed)
The SIG522 Classic uses a simple blowback action and 25-round magazine capacity for reliable .22 LR performance. Controls mirror the 55x lineage, with a right-side charging handle, a left-side selector with S/F markings, and a bolt hold-open lever.
Construction pairs a 7075-T6 aluminum upper receiver with a polymer lower. Polymer furniture includes a ribbed, ventilated handguard and a ribbed polymer pistol grip. The folding, skeletonized stock provides a compact profile, with a 13.5-inch length of pull.
The 16.6-inch barrel is threaded 1/2x28 and fitted with a factory SIG 55x/556-pattern birdcage flash hider. This configuration supports common .22 LR muzzle devices and keeps the platform adaptable for range use.
An integral Picatinny rail spans the upper receiver for optics mounting. A front sight block is present, and there is no front sight installed. Included is a Sightmark reflex red-dot optic with an integrated laser module for immediate use on the range.
This model is discontinued and was produced in the USA, adding appeal for buyers who want a rimfire trainer that captures the handling of the SIG 55x/556 family with accessible .22 LR operating costs.