The PX-5.7 is everything you love about the Tisas PX series of striker fired pistol in the popular 5.7x28mm cartridge. The pistols polymer frame is designed to be ergonomic in all the best ways for proper grip and an aggressive feel in the hand. Ambidextrous slide stop lever and a reversable magazine release make this perfect for both right- and left-handed shooters. The PX-5.7 features the fantastic trigger with integrated safety bar from our GEN3 models that is tactile and breaks cleanly. The included Fiber optic front and black serrated rear are Glock(R) pattern sights offering unlimited aftermarket options. Optics Ready version is cut from the factory to accept a direct mount RMRsc pattern optic. Tisas PX series pistols come standard with our premium lockable hard case, two magazines, cleaning kit, trigger lock and instruction manual.Tisas PX-5.7 5.7x28mm 20+1, 4.80" Black Carbon Steel Barrel, QPQ Black Optic Ready/Serrated Carbon Steel Slide and fiber optic front sight. Black Tennifer Polymer Frame w/Beavertail & Picatinny Rail, Black w/Interchangeable Backstrap Grip. Guns.com Full Review of the PX-5.7