Various forms of 2-stage. Some, like an unmodified M1911 pistol just have lots of trigger bar movement before the bar touches the sear.
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communities.msn.com/TheMarylandAR15ShootersSite/triggerfaq.msnwPossibly the difference is that a 1911 is not a mechanically designed two stage (i.e., a standard milspec trigger is a single stage with some slop -- whereas my Wilson Combat has no takeup before sear engagement). A 1911 trigger moves freely in its housing before directly engaging the sear.
Correct me if I'm wrong (I've got to start getting my rifle out when I post), but doesn't an AR15/M16 trigger directly engage the sear? Kind'a like a 1911, isn't it possible to have some take up slop in an AR15/M16? I know there's a slight movement and increase in pressure in my stock triggers. Heck, even most modern stock 1911 triggers are better than AR15's in take up.
Whereas a true two stage has a mechanical first and second stage built in. It's not just "slop."
So I don't necessarily think that you can confuse "sloppy takeup" with a two stage trigger.
Those in the know pleases correct me if I'm wrong. This is just kind'a what I could gleen from my experience with 1911's, DA/SA autos and AR15/M16's.
ALTHOUGH, even before pushing the send button I had to edit this to add:
On a 1911, 3 springs come into play on the firing mechanism.
1. The sear spring finger pushing on the trigger;
2. The sear spring finger pushing on the sear;
3. The mainspring pushing on the hammer strut and hammer.
So, I suppose that you could create a really good two stage in a 1911 by tweaking #1 to about 5 pounds of pressure and then setting #2 and #3 to a hammer drop weight of around 2 pounds. Is it realistic or practical in a 1911? I don't know. Guess I'll have to defer to the experts.
I'm starting to confuse myself.
DROP THE DREMEL TOOL AND MOVE AWAY FROM THE 1911.
There. That shocked my back into reality. Sorry for the rambling. Maybe somebody can set us straight.
(PS I'm smart enough to not even own a dremel tool. Though it would have been useful in removing that blade from my lawn mower....)