Ever wonder how full-auto and semi-autos work?

[AB]

I had an opportunity to work on a 3RB rifle not too long ago. That trigger group is damn ingenious!

https://www.youtube.com/watch?v=cxwPEL8winI

[Airgator0470]

I had an opportunity to work on a 3RB rifle not too long ago. That trigger group is damn ingenious!

https://www.youtube.com/watch?v=cxwPEL8winI

It's also noteworthy to point out that because of the cam, you don't always get three shots per trigger pull when you switch to burst... the number of shots initially depends on where in the cycle the cam is orientated. Sometimes you get just one shot... making you think something is wrong... it's not, it's just finished the last round of the three round cycle. Also, it's not uncommon to get 6 rounds per burst...