Molded, one-piece chassis and adjustable buttstock assembly are manufactured with glass-filled nylon for strength, stiffness and stability, making a solid foundation for accuracy each and every shot. Adjustable buttstock features a flat Picatinny bag rider making it easy to affix a rear monopod. A molded-in window provides a tether point for your squeeze bag, and a metal QD pocket makes it easy to secure a sling Quick-Fit adjustable Precision Rimfire stock allows length of pull and comb height to be quickly and easily adjusted to get proper fit over a wide range of shooter sizes, outerwear and shooting positions. Indicating marks molded into the chassis help you quickly return to a previous position. Big-Gun bolt throw adjustment enables shooters to change from a rimfire 1-1/2” bolt throw to a short-action centerfire 3” bolt throw, reducing the chance of short-stroking your bolt in competition. Ruger Marksman AdjustableTM trigger has a pull weight range of 2.25 to 5.0 pounds; adjusting wrench is stored in a buttstock compartment. Ruger’s own AR-Pattern pistol grip and safety selector incorporates an extended reach for maximum control and access to the 45 degree, reversible safety selector. May be configured with most AR-style grips and selectors. Anodized Picatinny scope base includes 30 MOA elevation for increased long-range capabilities out of the box. Oversized bolt handle for positive bolt manipulation (same as the Ruger Precision Rifle(r)). 15″ free-float M-LOK(r) handguard is made of hard black anodized aluminum and features M-LOK(r) slots on all four sides, for improved scope clearance and easy mounting of M-LOK(r) compatible rails and accessories. 18″ target barrel is cold hammer-forged from 4140 alloy steel to create ultra precise rifling for excellent accuracy. Barrels can be replaced easily by a competent gunsmith using AR-style wrenches and headspace gauges. Threaded barrel (1/2″-28) for standard muzzle accessories, like the Silent-SR(r) suppressor, comes with a factory-installed thread protector covering both the threads and crown. Accepts all 10/22(r) magazines. Also includes: one, 15-round BX-15(r) magazine. Model 8401 ships with two, 10-round BX-1 magazines.