I like the look of the "non-RIS" as well, but RIS. RIS ftw. Long/short, doesnt matter just more weight, but you can mount an RIS 203 on anything with 20 mil rails... Like so:

Notice the suppressor. It is of the utmost importance that your rifle be quiet. Regardless of the 203 nades going off left and right at a billion decibels, we must keep the rifle itself quiet!