Well there are two different types. One has the spot where the mag goes closed off, and you load it from the top with stripper clips. It is machined so it cannot accept mags at all. Type in Fab 10 to yahoo and thats what that one is.

The second I just found out about. It uses a regular lower, but the magizine is bolted it with either a oin or bolt and nut. So then when I take it out of state, I could just take the bolt out and use it like a regular AR. It is the only loophole us Californians could find, but we know that they will make a law banning them soon.

But keep me posted on your lower, I will find out from the shop doing the install of the bolts about getting one from out of state.