The 110 Model has functional features of the Glock 17/22.  Not affiliated with Glock.
 
Safe, effective, and innovative, the Shot Indicating Resetting Trigger (SIRT) Training Pistol was developed by shooters for shooters, to complement, not replace, live fire training. The SIRT Training Pistol brings together a host of patent pending technologies critical to improving shooting accuracy while addressing issues of cost and liability.
 
Each Sirt Training Pistol Contains the Following:
1 SIRT Training Pistol
1 Training Magazine
Trigger Adjustment Tool
Laser Windage and Elevation Adjustment Tool
 
*Case not included with SIRT.