Ruger GP100

The Ruger GP100 is a double-action revolver chambered in .357 Magnum, introduced by Sturm, Ruger and Company in 1985 as a successor to the popular but sometimes fragile Security-Six and Speed-Six series. The GP100 was engineered from the ground up to handle a steady diet of full-power .357 Magnum ammunition without the accelerated wear that plagued some competing designs. Its frame is investment cast from a single piece of stainless steel or chrome-moly steel, with no sideplate – a design choice that gives the GP100 exceptional rigidity and simplifies the action. The cylinder holds six rounds and swings out to the left for loading, and the gun is also fully compatible with .38 Special ammunition, making it versatile for both range use and practical carry.

The GP100’s defining characteristic is its overbuilt construction. The barrel is solid rather than sleeved, the crane and cylinder latch are beefy, and the overall dimensions are deliberately generous. Ruger’s triple-locking cylinder system – which locks at the front, rear, and bottom of the crane – ensures tight lockup and consistent alignment with the bore. The grip system is modular, using a stud-and-insert design that allows shooters to swap between rubber combat grips and aftermarket wood or synthetic options without any permanent modification. Adjustable rear sights and a ramped front sight with an interchangeable insert round out the standard features.

The GP100 quickly earned a reputation as one of the toughest production revolvers ever made. It became a favorite among handgun hunters, metallic silhouette competitors, and anyone who wanted a revolver that could absorb thousands of rounds of magnum ammunition and keep running. Law enforcement agencies and security professionals also adopted it as a duty weapon during the era when revolvers still competed with semi-automatics for holster space. Decades after its introduction, the GP100 remains in production with an expanded range of barrel lengths and finish options, a testament to the soundness of its original engineering and its enduring appeal among shooters who value strength and reliability above all else.