Rock Island YTA 51158 | .22 LR Semi-Auto | 21″ Barrel

The Rock Island YTA (part number 51158) is a youth-to-adult .22 LR semi-automatic rifle built with a tactical layout and a 21-inch threaded barrel. It ships with a single 10-round magazine, fixed sights and a synthetic stock with a rubberized butt pad spacer. A compact low‑power variable like the Vortex Crossfire II 1-4×24 or a quality red dot such as the Vortex StrikeFire II pairs well on the receiver for quick target acquisition under $1000.

Product Specifications

• The manufacturer is Armscor / Rock Island Armory.
• The model/part number is 51158.
• The caliber is .22 LR.
• The barrel measures 21 inches.
• The overall length is 45 inches.
• The finish is black / blued.
• The action is semi-automatic.
• The stock and grip are synthetic with a rubberized butt pad spacer.
• The rifle includes one 10-round magazine.
• The barrel is threaded with an 1/2×28 thread pattern.
• The sights are fixed with a hooded bead front and leaf-type rear (peep) arrangement.
• Drilled and tapped for optics: no.
• Can be disassembled: no.
• An additional feature is an adjustable length of pull.
• UPC 4806015511588.

This rifle is a pragmatic choice for instructors, youth transition shooters and range users who want a .22 LR platform with a tactical ergonomics package and a threaded barrel for future accessory options. Its synthetic furniture and straightforward sighting system make it simple to set up for training drills or informal target work while keeping controls and handling familiar to adult shooters.