Ya the shell holder is for a real steal shotgun.
I never realized that the airsoft shells are bigger than the real steel ones, but that explains a lot.
The tubes that hold the shells were flexible enough to fit the airsoft shells in, but when I did, the whole unit kind of bowed out, instead just staying flat.
I solved this by making a few strategicaly placed cuts into the plastic on the backside of the holder. Then I gooped alot of JB Weld onto the back of it and I zip tied the piss out of it. After about an hour she was rock solid and perfectly flat. (reminds me of a girl I dated once
) Once all the JB had dried, I did go back and fill in a few little gaps between the holder and the gun with some hot glue for extra strength.
All in all it was a bit of a bitch to mount, but I think that it really adds something to the gun.
Gordo