I just bought a Spikes Tactical lower at a gun show. The trigger pin holes appear slightly larger than the ones on my Del-Ton lower. I figured it might just be that they looked bigger because the Del-Ton has pins in it, and the Spikes doesnt yet. But i was told that both manufacturers make the same size pin holes(small). Can someone please verify this for me before i order my trigger unit. thanks a lot!

The pin size in both should be the standard .155

You will need .154 pins.

The standard pin size is .154 like the poster above me advised.