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Any of the models listed with ".170" in the part number are the large pin models and if they do not have ".170" in the part number they are standard .154 triggers. Here are the main part numbers:
Elftmann Tactical MATCH-C: Elftmann Match Trigger Curved
Elftmann Tactical MATCH-C.170: Elftmann Match Trigger Curved LRG Pin <--Large Pin
Elftmann Tactical MATCH-S: Elftmann Match Trigger Straight
Elftmann Tactical MATCH-S.170: Elftmann Match Trigger Straight LRG Pin <--Large Pin
A long as your Aero Precision lower is of the Ar-15 family, this item will work.
Yes this trigger will be compatible with your Ruger AR.
As long as its AR-15 gun model it should work.
You would be using the pins from your firearm unless your scratching building the firearm then you would need to purchase the pins separately.
You only need to consider large pins with Colt manufactured AR-15s, but unfortunately this isn't uniform. Multiple trigger manufacturers state that, in general, AR-15 rifles produced before 1991 and after late 2009 accept small pins while those made between 1991 and late 2009 typically take large pins. You'll need to measure to be certain.
You only need to consider large pins with Colt manufactured AR-15s, but unfortunately this isn't uniform. Multiple trigger manufacturers state that, in general, AR-15 rifles produced before 1991 and after late 2009 accept small pins while those made between 1991 and late 2009 typically take large pins. You'll need to measure to be certain.
Unfortunately they do not make an AK version of this trigger.