.45 ACP/Auto caliber; Standard model features a threaded barrel, reversible, side-folding, adjustable stock and 13-round magazine; Designed to accept commonly available Glock-pattern full size magazines; Unique bolt-over-barrel design with the magazine in the grip allows for excellent balance and control; The folding stock is reversible and features an adjustable length of pull, but can easily be replaced with AR-pattern stocks; The rear of the receiver has a Picatinny rail for maximum accessory compatibility; Features a 16.25" alloy steel barrel with .578"-28 threaded barrel with thread protector allowing for the attachment of popular muzzle accessories including muzzle brakes, flash hiders and caliber-appropriate suppressors; Folding stock and collapsible sights are ideal for storage; Rated for SAAMI-spec +P ammunition, further enhancing its versatility and performance; Impressive ergonomics with ambidextrous manual safety, reversible charging handle, ergonomic bolt release and extended magazine release; Utilizes Ruger's safe, reliable and proven Secure Action fire-control system that combines a protected internal hammer with a bladed-safety trigger; The trigger has a short, smooth pull, clean break and positive reset; CNC-milled handguard that is Type III hard-coat anodized aluminum for maximum durability, with M-LOK accessory attachment slots on seven sides; Multiple QD sling sockets allow for maximum versatility; Ruger Rapid Deploy folding sights are adjustable for windage and elevation and the full length Picatinny rail allows for optic mounting; Also includes: one magazine, M-LOK QD sling socket and hex wrenches for disassembly