My only complaint with the SL-8 (and I'm sure many other civilian shooters shared this gripe) is its butt-ugly stock with that "butthole" pistol grip. If you're asking a buyer to pay out $1500 for a rifle based on a military design, you simply have to do better than that, IMHO. The SL-8's failure on the marketplace was undoubtedly aided by this.
It could have been issued with a proper pistol grip, too. They only would have lost the opportunity to sell it in California and New York, which probably wouldn't amount to all that many sales, anyway, as dedicated buyers in those states have a way of finding what they want elsewhere.
They aren't. The SL-8 was intentionally designed to use a single-row feed 10-shot capacity magazine, due to the *Assault Weapons Ban* Accordingly, there've been conversions for pre-ban M16 magazines or for those fose pre-ban synthetic magazines for the Steyr AUG.
But the modular character of the rifle should make it possible to do all sorts of interesting things with the SL-8 once the AWB sunsets in 22 weeks.