There were a bunch of these brought in after the ban with thumbhole stocks and the folder still attatched. Yeah, it looks dumb as all getout, but they are post-ban and plenty of folks just took off the t-hole and sold them as pre-ban. Usually the bayo lug is the giveaway. The post-bans won't have one and the pre-bans will. Also it's rare for the pistol grip (which obviously was added later) on a post-ban to match the handguards.
Judging from the pic, I'd say it's a preban. Sure seems to have a bayo lug and the pistol grip is indeed Chinese, and the right one, and a matching shade. I'd say it's a good deal.
I've seen two being sold side-by-side for the same money, by the same guy on Auction Arms. One is a preban, and the other a post-ban that someone took the T-hole off and added a PG. He's selling them both as the same gun (and probably figures they are), but one's a pre and the other's a post.
That one though looks right to me.
Ross