Cost effective shooting: Shoot .22 ammunition at a fraction of the cost of 9mm or .40 cal; Easy to Install & Use: Simply slide your Glock slide off, replace with TSG, and put in magazine; Realistic weight & feel: TSG is designed with a similar weight and feel to your factory Glock; Noticeable Craftsmanship: Unique design & quality above all others; Easy Silencer or Compensator Attachment: Optional threaded muzzle for easy thread-on silencer or compensator; Factory GLOCK sights: Realistic platform for shooting your Glock; Does Not Fit Gen 5 Models; Fits GLOCK models 17, 22, 31, 34, 35 & 37. Gen 1-4