Ruger differences?

[Mr. 16 gauge]

Hello;
Can anyone tell me the differences between the Ruger M77, Ruger M77 mkII, and the Ruger M77 Hawkeye? I find it a bit confusing.....are there actual structural differences, or are the differences cosmetic? I find the whole thing a bit confusing.
Thanks in advance............

[Jack]

The original M77 is a push feed action with a plunger type ejector. The safety is a 2 position one, on the tang.
The M77 Mk2 uses an extractor and ejector similar to a pre 64 Model 70 Winchester or a 98 Mauser- it's a controlled feed action. The safety on a Mk2 is on the right side of the action, near the rear of the bolt shroud. The safety is a 3 position one (middle position blocks the trigger, but lets you open and close the bolt).
The Hawkeye action is the same as the Mark2 action as far s I know. The Hawkeye has a redesigned stock and some new models.