This is a Ruger PC-9 Carbine that has the free float rail (handguard). This model also has the take down feature along with a threaded barrel.
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CNC-milled handguard that is Type III hard-coat anodized aluminum for maximum durability, with Magpul® M-LOK® accessory attachment slots on all four sides for easy mounting of M-LOK-compatible rails and accessories.
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Interchangeable magazine wells for use of common Ruger® and Glock® magazines. Ships with SR-Series™/Security-9® pistol magazine well installed and an additional magazine well accepting Glock® magazines is included*. Ruger American® Pistol magazine wells are available at ShopRuger.com.
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Easy takedown enables quick separation of the barrel/forend assembly from the action for ease of transportation and storage. Takedown is as simple as locking the bolt back and verifying that the rifle is unloaded, pushing a recessed lever, twisting the subassemblies and pulling them apart.
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Dead blow action features a custom tungsten dead blow weight that shortens bolt travel and reduces felt recoil and muzzle rise. Bolt is machined from heat treated, chrome-moly steel to ensure strength, structural integrity and durability.
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Reversible magazine release and reversible charging handle to support ambidextrous use or one-handed control manipulation while maintaining a proper firing grip*.
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Cold hammer-forged, chrome-moly steel barrel with ultra-precise rifling provides exceptional accuracy and longevity. The heavy contour barrel provides consistent accuracy, while barrel fluting sheds unnecessary weight and allows for quick handling.
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Threaded barrel with included thread protector allows for use of standard muzzle accessories.
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Accurate sighting system with adjustable ghost ring rear aperture sight and non-glare, protected blade front sight.
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Soft rubber buttpad with spacers allows the rifle to be properly sized for different shooters or varying levels of outerwear or defensive gear (three, 1/2" spacers included).
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Durable, glass-filled nylon synthetic buttstock features a proprietary texture for enhanced control and an integral sling mount for rapid sling attachment .
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Light, crisp trigger pull with minimal overtravel and positive reset utilizing proven 10/22® trigger components.
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CNC-machined from an aerospace-grade 7075-T6 aluminum billet, the receiver includes an integrated Picatinny rail and is Type III hard-coat anodized for maximum durability.
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Also includes: one, SR-Series™ pistol magazine and hex wrenches for rear sight adjustment, buttpad spacer adjustment and charging handle removal.
Source: Ruger.com