Hatsan’s Quattro trigger is one of the most sophisticated airgun triggers on the market today.  It has 3 user-adjustable settings via 3 adjustment screws. Starting from the front of the rifle:

• Adjuster #1: Closest screw to the muzzle. This screw sets the initial depth of sear engagement, or overall trigger travel.
• Adjuster #2: Middle screw.  This screw sets the point at which your 2^nd stage engages.
• Adjuster #3: Rear screw. This screw adjusts the final pull weight of the trigger.  DO NOT over-adjust this screw, as there must be enough spring pressure to set the sear when cocking your gun!

Here are some adjustment pointers for those who wish to fine tune your triggers.  Make only small adjustments to one screw at a time so that you can easily reset if you make a mistake and over-adjust your trigger. 
*Exercise caution when making trigger adjustments.*  It is a good practice to take notes and/or photos of your initial working trigger settings so that you can return to that point should you need to start over.

• Break-Barrel and Under-Lever Airguns
  • Adjuster #1 is a cap-head screw and is best left all the way in (clockwise) for best trigger feel.
  • Adjuster #2 is a cap-head screw and can be set to the shooter’s preference, but do not set more than 1.5 turns out or the gun may not fire. If you experience a failure to fire, re-set this screw all the way in and start over with your adjustments.
  • Adjuster #3 is a set or “grub” screw and is adjusted with a 1.5mm hex key.  With approximately 2 threads exposed, it is at its lightest setting.  Unscrewing it beyond this does not lighten the trigger pull any further, and may interfere with the trigger blade if it is too far out.
  • If you need help, please contact our Customer Service Department for assistance.