Design Details
The SR9 is the first large-caliber striker fired pistol designed and manufactured by Sturm Ruger. Similar to Glock's "safe action", the striker fired SR9 features a pre-set trigger. With this type of action, the striker is partially cocked when the slide is cycled, then is fully cocked and released when the trigger is pulled. Due to safety concerns, the moderately long and heavy trigger pull of this type is seen as ideal for law enforcement and self-defense applications. The SR9 and SR9c have an identical trigger group. Enthusiast website Gunblast rated both the SR9 and SR9c examples it tested with a factory trigger rearward travel at 9.5 mm (0.37 in). Gunblast rated its SR9 example with and trigger pull of 30 N (6.7 lbf), and Gunblast rated its SR9c example with a trigger pull of 23 N (5.2 lbf). Gunblast's SR40 example was rated with a trigger pull of 29.5 N (6.6 lbf). The difference in trigger-pull is most likely due to variances between individual guns, and not to a change in specs by Ruger between the models. The trigger travel is 7.8 mm (0.31 in).
The SR9 is recoil operated with a locked breech. It features a staggered column box magazine (double-stack magazine) with a capacity of 17 rounds, and is also available in a 10 round configuration for locales where capacities are restricted. The pistol has a very low slide profile; this holds the barrel axis close to the shooter's hand and makes the Ruger SR9 more comfortable to shoot by reducing muzzle rise and allowing for faster aim recovery in rapid shooting sequences. The slide is available in either brushed or blackened through-hardened stainless steel, and the frame is fiberglass-reinforced nylon polymer, resistant to warping or failure. The frame is offered in black or olive drab. The SR9 also has a reversible backstrap which allows the owner to select either a flat or arched grip housing, based on personal preference. In addition, the SR9 sports a Picatinny rail for the mounting of laser sights and tactical lights.
The SR9 boasts multiple safety devices such an ambidextrous manual thumb safety and magazine release, a loaded chamber indicator, a visual and tactile cocked-striker indicator, and a firing pin block safety which prevents the pistol from firing if it is accidentally dropped. The SR9 also features a magazine disconnector. The Ruger SR9 can safely be dry fired with an empty magazine in the pistol. A Ruger-issued warning states that, due to the disconnector, dry firing the pistol without the magazine inserted will cause unnecessary wear to the striker block, but published firearms industry information notes that the SR9's disconnect can be deactivated simply by removing some of the disconnector linkage.
The SR9's open iron sights are of the three-dot enhanced contrast variety, and offer drift adjustment on both front and rear blades for windage, as well as rear-sight adjustment for elevation.
Read more about this topic: Ruger SR Series
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