Precision fit for the following standard frame GLOCK Generations 3 & 4 (9MM, 357 SIG, 40 S&W, 45 GAP): G17, G17L, G17 MOS, G18, G20, G21, G22, G24, G31, G34, G34 MOS, G35, G35 MOS, G37, 40, 41