Timney Featherweight DeluxeTrigger fits Arisaka 7.7 Model 99 Actions- Replaces Arisaka trigger mechanism, adjustable from 2-4 lbs and includes trigger blocking safety. Timney Featherweight Deluxe Triggers are precision machined and hand-fitted to provide a crisp trigger pull. They feature a lightweight alloy housing with machined and hardened steel working surfaces. The trigger pull weight is adjustable from 2 to 4 lbs. with adjustable take-up and overtravel. Minor fitting may be required. The Featherweight Deluxe also features a trigger blocking side safety. Minor fitting may be required.- Installation instructions are included.