For the Service Rifle game, a mat is really a PITA to haul around because in the ORA we are shooting the new CFSAC matches 1-4 (read: no time to set up a mat and then move to the next firing point / mound).
Now for Precision Rifle, that's another story. I like to use a combination rifle case and mat for my M70 Stealth like this one:
http://www.gunaccessories.com/Blackhawk/WeaponCases.asp
Mind you that BHI version is $ 175 give or take. Since I'm too goofy to deploy to the 'Stan, a ZXhinese knock off (Voodoo? NcStar? TacForce?) will do the job for around $ 100. Hey, I'm a mirror kommando and it's not worth spending lots of $$ on features I'll never use, like stalking. The only critters I stalk are earth pigs!
As you can see, spending $ 100's of dollars is not justified. So Zhinese knockoff stuff will work the the hunting fields.
Buy what works for your game, budget, color scheme, and finally LCV (look cool value)...
Cheers,
Barney