The OA93 is a gas piston operated AR15/AR18 hybrid built using traditional AR15 components and capable of accepting STANAG magazines. I owned an OA93 carbine a while back and I really enjoyed it. I prefer folding stocks to the telescopic stock of the standard AR carbines. Since this use a gas piston design, it eliminates the buffer tube and thus can accomidate a folding stock. The folder used is very firm and the lockup is extremely solid with no slop. Its very similar, if not identical to the FN/Galil folder. My gun would hold 2 MOA maximum with M193 and slightly under that with good quality ammo. This isn't quite as accurate as a DI weapon, but its accuracy is excellent and is more than enough for a defensive weapon. There are no iron sights and no
provisons to mount them. I have seem people adapt iron sights to these weapons, but it takes some time/ingenuity. I had several different optics on mine while I owned it, but I never installed iron sights. Most people mount BUIS on the front/rear of the 1913 rail. The rail isn't very long which equates to a very short sight radius, but still very functional. The HK G36 and certain ACOGs have "emergency" sights similar to this, but mounting BUIS on a OA93 as I have described would be infinantly more functional. Several LE agencies have used and continue to use OA93's as they are excellent weapons. It offers all the advantages of the standard DI AR15 with the added bonus of a piston operating system. These are great SBR weapons as they don't have the problems DI short barreld weapons have. They only thing I did not like about my OA93 carbine was that it did not have factory iron sights. Some type of an optic is mandatory as I think the sight radius with BUIS is too short for anything other than backup/emergency use. It also weights slightly more than a standard AR, but not prohibitively so. Some accessories obviously won't be compatible, but I am a KISS believer so this didn't affect me. I beleive Olympic makes a rail for this weapon, though. IIRC, this had a lifetime warranty, just like other Olympic weapons. I have only owned a few Olympics, but I have known several people who have and all had excellent luck. They make good weapons and offer excellent customer service. IIRC, the price for a brand new OA93 carbine is around 1200.00 Mine was in the condition you inquired about and I paid 850.00 with a "homeboy hookup", which was fair IMO. Should you decide to buy it, I think you will be very pleased. Not only are the cool and different but they are very reliable and functional weapons. This would certainly suffice as a SHTF or HD weapon. There is more information on this site
www.quarterbore.com/ar15m16/oa93.htm