Winchester Repeating Arms 1200 (Historic Manual) - Manual (Page 11)

TO DISASSEMBLE TRIGGER GROUP FROM RECEIVER
1. Be sure gun is unloaded. Close action, push
safety to “ON” position, turn gun until trigger guard
is up and push out trigger guard pin from left.
2. Lift trigger group out of receiver by pulling on
trigger guard.
3. Do not pull trigger after disassembly.