Here's the list:
Bottom-loading magblock (or any that hold bolt open on last round)
16" 9mm upper (carbine preferred, with ramped bolt)
9mm buffer

All I have to trade is a 16" DTI carbine upper (great condition, less than 300 rds through it), but I will have cash for the extra.

Or if anyone would like to trade a Slide-fire stock for the upper straight up, I'll take that.

Thanks for looking,
Jon