How does the two-stage trigger work?

I took one of these on my gun last night, and it said it had two firing modes (one full auto, one semi).  But I don't see any option to toggle it.  Anyone know how it works?  Does making one quick pull do a single shot, and holding it go to full auto?

 

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Last updated July 3, 2018 Views 7 Applies to:

when you only pull the the trigger about half way you will fire a single round, and when you fully pull the trigger you will fire in full auto.

Oh, I see.  So obviously you just want to use the single round for sniping (so you can take your time).  I'd never have that kind of dexterity to do this in a hectic firefight.

I didn't know this had a two stage trigger nice