ZLG PICTURES FOUND! Answered
Pictures found! Thank you, Zak!
I already have it built, and it surpasses expectations. It happily digests most connector bullets, rods, oodammo, and fin ammo. The trigger is shear genius, it reliably blocks the pin and releases it with little effort. A K'nex gun called "The Avenger" has a trigger just like this, but Zak has a tan clip keeping the trigger in the guard, while the Avenger doesn't and the trigger is somewhat loose.
I'm overall very impressed.