Convert your Glock into a .22 or with an Advantage Arms conversion kit. Advantage Arms Glock Conversion Kit is Advantage Arms most accurate conversion kit for Glock. Does not fit Gen 4 Glocks.

Features :

• Adjustable sights
• Last round lock open
• 30 second installation
• 1 year factory direct warranty
• Fits Glock 20/21/20SF/21SF Gen 1-3