I'm trying to under stand the AR two stage trigger.

[clutch]

Does the spring for the disconnector also work to generate the pressure in the first stage of a two stage trigger? I'm trying to understand the fire system of an ar.

Thanks,

Clutch

 

[Owen]

usually the disconnector spring is what adds the force for the second stage. The disconnector bumps up against the back of the thingy on the hammer that engages the sear and the disconnector. The weight of the first stage is controlled by the hammer spring, the trigger spring, and the angle of engagement between the hammer and the sear.

Of course, there are about 5000 different 2 stage triggers out there now, so your mileage may vary.

 

[clutch]

I had a guy order a RRA AR0940X Complete Lower Half / Two Stage Trigger / A2 Buttstock for me but when I test the trigger, it feels like there is only an ounce or two between stage one and stage two. I'm wondering if I even have a two stage trigger.

I sent an message off to RRA with the serial number of the lower asking them what they think they shipped but today is Saturday so I'm not going to get an answer until Monday.

Clutch

 

[madcratebuilder]

The RRA two stage uses the hammer and trigger spring for the first stage pressure. Second stage starts when the hammer hook touches the disconnector and the disconnector spring adds the second stage pressure.

 

[clutch]

Thanks MadCrateBuilder,

I'll wait for RRA to respond on Monday or I'll give them a call after work. My upper is still being built by White Oak so I have time to work this out. Besides it is a bit winter outside this time of year.

Between the two responses, I learned something which is always good.

Clutch

 

[supercalvin56]

Use google to get a picture of the two stage and the single stage. Then compare it to your own. I'm sure it'll be the two stage that you have.

 

[Grunt Medic TXARNG]

Clutch - I have a White Oak Armory upper on my service rifle setup and love it. Certainly a great value for the money!

 

[clutch]

I called Rock River this afternoon, sales confirmed that my FFL ordered a NM lower.

Tech support told me they set it up 1# first 3.5-4# last. Thinking on that considering the various milsup rifles in my collection is how it tends to be. Remove most of sear engagement for a fast, quick break.

In my googling I managed to run into a few shooters that do this the other way with most of the weight on the trigger spring with a the rest on the second stage. That coupled with my thinking the sear was in a different part of the trigger assy than where it is had me confused. I thought it was at the bottom of the hammer from the pictures instead of opposite the disconnector hook/bump.

I'm curious, how many shoot a heavy first stage with a light second? Or a balanced 50/50 trigger?

Thanks for the help. I have a bit to learn.

Clutch