Last year a friend picked up a "Malaysian Insurgency"
Auto-5 with extended mag (and extended wood, a
neat-looking feature) with all matching serial numbers.
Beautiful gun, and relatively cheap at $700.
I used to own a riot style BPS with an 18-1/4" IC
bead barrel and a matte finish on the metal, low-gloss
wood. Very nice . . . too nice to bang around,
actually, so I sold it at a profit and got a beater.