Opsgear Billet M16 Front Sight

Simple-Functional-Design, Easy Maintenance and Gorgeous. 

To remove the remote airline from your gun without having to shut off the main tank valve.

Slide check to the rear to disconnect air source from the marker. Slide check forward to allow air source to the marker. So easy you can do it exhausted.

Slide check valve comes in Bead Blasted (Non-Reflective Surface), Billet Aluminum.

O-Ring Replacement Specifications:

MAIN SEAL: 2x, Standard Tank O-Rings. 1/16" width-9/16th" inside diameter. SLIDE RETAINER: 1x, 1/16" width-7/16th" inside diameter.