I'll be honest here. I would be leary of a slip on front sight. You will have to make sure that it is very straight. Also, not sure how comfortable I am with how solid it is. I would be worried of movement and it eventually falling off under recoil. Yes, the slip on is a cheaper option(cost for product and cost of installation) but I am not convinced of it's durability. Also from what I can see those slip on sights are held down by a tension screw(not sure what else to call it) under recoil if it moves you will end up with some pretty nasty scratches on the end of the barrel. If you tighten it down to much it may damage the barrel as well, this I'm not sure could happen.
Good luck to you thought and like I said in the PM's keep me posted.
Eric