Originally Posted by
MistWolf
Can standard AR triggers, whether generic or ALG, really be considered USGI as they are semi-auto only?
Two Stage or Single Stage? I don't know about true USGI (burst or full auto) but the standard AR trigger has quite a bit of travel (what is often called "pre-travel") before the sear breaks, same amount as the two stage G- trigger. The difference (in feel, not geometry) is that the pull weight is the same all the way through to sear release. With the G- trigger, the first stage of travel is much lighter.
In studying the two stage trigger of the Garand/M14, you'll see that the first stage is really a long sear engagement. Once it hits a certain point, the weight increases suddenly just before the sear releases. I believe the G- trigger works the same way.
The 3 gun trigger (I believe it's called) has the same pull as the standard AR trigger but at a reduced pull weight and is very smooth. A single continuous pull weight until the sear breaks.
In one point of view, the standard AR trigger and the 3 gun trigger can be defined and two stage triggers with the same pull through it's travel. However, I'm of the mind that since the second stage of a two stage trigger is defined by it's sudden increase in weight just before the sear release, that having a pull that's the same weight throughout the travel effectively means it's a single stage pull