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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
That is a great question! I made the same mistake when I ordered mine. ELF manufacturers both standard as well as large pin (colt style) triggers. However I found on the opticsplanet website it’s a little more difficult to distinguish which is which. They’re customer service department was very helpful getting the correct product I needed. I would call optics planet when you order to make sure you’re getting the standard mil spec pin size as well as the style ( curved or straight ) trigger you want.