This comprehensive Glock Lower Parts Kit is designed to enhance your G17, featuring a G17 slide lock spring and another G17 slide lock spring for your convenience. Please note that this kit does not include the locking block. Ideal for replacing OEM parts on your existing handgun, this Lower Parts Kit ensures reliable performance and functionality. Whether you're performing maintenance or upgrades, this kit provides the essential components you need to keep your Glock operating at its best.