i have seen these Cobray side by side derringer's in .45LC/.410 and have been wanting to get the 3in model. sovereignguns. com had them and i just turned 21 last week and was going to order one but they dont carry it any more. they have an 11in version that looks like it just has barrel extensions added on to the 3in model. does any one know if these extensions are removable? or another place i could purchase this gun? or where i could find the version that is an over under with a .22 barrel on top and .45/.410 on bottom? any info will help thank you!