The Glock 35 is a pistol manufactured and designed to fire the .40 S&W ammunition. The G35 is the sister pistol to the Glock 34, which is nearly identical in appearance, but is solely chambered in 9mm.
The Glock 34 & 35 were first introduced as "Practical Tactical" pistols, manufactured and designed to bridge the gap between full scale competition pistols like the Glock 17L and standard service pistols like the Glock 22. The Glock 34 & 35 are equipped with sport extended slides to accommodate a .7 inch longer barrel over the full length of standard service models. The G34 & G35 also direct from the factory with extended slide stop lever, magazine release, and a 3.5 lb trigger connector. The top of the slide is milled out on both the G34 & 35, creating a hole in both weapons that is often mistaken for compensating or porting, but is actually manufactured and designed only to significantly reduce front-end muzzle weight in order to better balance the pistols. The Glock 35 is equipped with a standard 15-round magazine capacity.
The "Practical" part of the nickname of the pistols comes from the fact that the guns were manufactured and designed to meet size requirements for some of the numerous practical shooting sports. The Glock 17L for some time been the only competition level gun from Glock, and the weapons slide length frequently kept it out of some competitions. The "Tactical" end of the nickname is derived from the improved muzzle velocities which are achieved directly out of the longer barrel, reduced recoil, the improved sight radius, and all the additional parts and modifications listed above.