The KelTec PR-5.7 is an ultralight, semi-automatic concealed carry pistol chambered in the flat-shooting 5.7x28mm NATO cartridge. Unlike conventional handguns that use detachable box magazines, the PR-5.7 features an internal/blind magazine loaded from the top of the slide using stripper clips, which eliminates a protruding magazine well and prevents accidental magazine drops. Weighing under 14 ounces and measuring less than an inch wide, it delivers a high-capacity 5.7mm payload in a package significantly lighter and slimmer than most subcompact 9mm handguns