You'd probably sell more of the front sight bases than the rifles if you could get them separate. Too bad another distributor has the market locked up on 10.5 and 11.5 6940 SBR's. You could always see if they'd be willing to produce non-monolithic rifles/uppers with the folding fsb.
http://www.phoenixlawenforcement.com...olt_6945-9.gif
FYI, Colt LE6921's are California legal if they are sold with a muzzle device pinned to 16.1, or with a 16 inch upper, unlike the 6920's, or anything with "sporter" or "ar-15" on it. If the price is similar to what you get the 6920's for, you could do some serious business.
http://www.atf.gov/firearms/faq/nati...moval-from-nfa

