Congratulations!! Yes it will work. You need the one for the Billet grip
https://infinity.mysparkpay.com/p/144-Billet-Grip-Trigger-Bow-Wide-Body.aspx
I'm running the triggers in both my18.9 Pro Custom and my 16.40 Pro custom. One thing though, I'm running STI mags in my 18.9 and MBX in my 16.40 with no trouble. When I use some of my older Canadian mags, the trigger bow drags on the side of the mag when the mag is full and sometimes prevents it from resetting. When I shoot a few rounds out, this goes away but it is an issue if you are going to use old mags. I think one of the other guys here, that are using this trigger, solved this by taking a few thousands off the insides of the bow. I'm sure they will chime in. I also like the Guncraft flat trigger as its a tighter fit and has less up and down play but, its a bit too long and bothers me. I could just grind it down to my taste but the SV looks better so it staying.