Gunsmithing any of the well informed know what this trigger?

[TWOMANATTACK]

Obviously older style Reminton But it has an X stamped on it. 40X perharps? Any help or explanation will be appreciated.

 

[Dans40X]

Re: any of the well informed know what this trigger?

First generation 700 trigger group(staked housing pins) w/ second generation round knob bolt lock safety.

First generation bolt lock safety lever being the oval knob type.

Second generation trigger group housing pins are the "dome head" rivet style.