Well I only have the wide mouth sealer and haven't bought the regular size sealer yet. But you can still remove the air from the regular jars without it. At least you can with the smaller jars.
There's a 3 canister set that came with my food saver. A small canning jar will fit into the largest size canister as shown in the picture. You attach the plastic tube to the lid on the canister and also to the food saver vacuum machine.
Then you push the canister button and it'll take all the air out of the pint size jar. I plan on getting the regular mason jar sealer, but until I do, it's nice to be able to seal the small jars. The jar in the picture has some brown rice in it. You can store all your rice, legumes, whole wheat pastas, etc. this way, but you'll want to use the quart size and not the pints.