Rifle Basix makes four trigger models for Ruger M77, M77 MKII and 77/22 model rifles. The #19-825 is a sear upgrade for the older M77 actions with a thumb tang safety. This sear uses the original trigger housing and safety, and makes the factory trigger adjustable from 14 oz. to 2 lbs. Instructions are included.
The #19-840 replacement trigger converts original two-stage M77 MKII Varmint/Target Triggers to single-stage operation. This trigger provides a light, smooth pull and adjusts from approximately 8 oz. to 3 lbs.
The #19-830 trigger is designed for the M77 MKII rifles which had single-stage triggers originally. Works in right and left hand actions with three position safety, including the new 204 Ruger models. This trigger uses the factory safety and is a 100% drop-in. Adjusts from 14 oz. to 2 lbs., instructions and a hardware package are included. This trigger will not work with the stainless steel varmint/target rifle which has a two-stage trigger.
The #19-835 trigger is made for the M77/22 family of rifles. This trigger is also 100% drop-in and uses the factory safety system. Adjustable from 1.5 lbs. to 3 lbs., and includes a hardware package and instructions. This trigger fits 77/22 actions chambered for 17 HM2, 17HMR, 22 LR, 22 WMR, 22 Hornet and 44 Magnum.
Sinclair, Issue:3B, Page:251