Kel-Tec PR57

The Kel-Tec PR57 is a semi automatic pistol manufactured by Kel-Tec. The weapon is chambered in the FN 5.7x28mm round, uses a rotating barrel locking operation and most unusually, uses an internal magazine fed from stripper clips (similar to the Steyr M1912 and the Grendel P10 .380).^{[1][2][3][4][5][6][7][8]}

Kel-Tec PR57
Type	Semi-automatic pistol
Place of origin	United States
Production history
Manufacturer	KelTec
Produced	2025–present
Specifications
Mass	0.866 lb (393 g) empty [1]
Length	7.2 in (182 mm) [1]
Barrel length	4.01 in (101.8 mm) [1]
Width	0.94 in (23.8 mm) [1]
Height	5.0 in (127 mm) [1]
Cartridge	5.7x28mm
Action	Unlocked Short-recoil, double-action only
Rate of fire	Semi-automatic[1]
Feed system	20-round integral magazine, fed by 10-round stripper clips.[1]