KDX,
Well, I'm generally pretty frugal (ie cheap) with cases, but I consider my carbine to be special. After looking at a lot of cases I selected the Hardigg M4 case only to find out that there is about a 4 to 6 month wait due to US armed forces priorities. Hardigg's civilain brand is Stormcase and they sell the identical case to the M4 as the M3100. Only difference is that the M4 has precut foam for a carbine, 7 ar mags, sidearm + 2 mags and a bit of room left over. All this in a case just under 40" long. Oh Yeah, it floats.
There is a Canadian distributor in Quebec. They were totally useless. Didn't return voicemail etc. I bought on-line out of the US.
Regards,
Maxim08