Looks like a Vector parts set build to me. I've heard various stories as to why Todd (Special Weapons/Tactical Weapons) sold all those Vector parts sets. I heard that one of Vector's owners had some legal problems over an ammo deal. My understanding is, there was a contract for some 7.62X39 for Iraq through the US Government. The contract specified no Chinese ammo. Chinese ammo was purchased, sent through another country, and was repackaged. I've also heard that the kits were so far out of spec, Vector rejected them. Be that as it may, the sets originally sold of $400 each minus the firing pin.
To me the biggest issue is who built the kit? Did the seller ever shoot it? How did the seller get it? I've had nothing but trouble with the MIMS bolts. I bought some RCM .40 caliber bolts to replace the original bolts. I've got a CA89-40 and a couple of the Vector V89-40 SDs that ghilliebear is building for me. I'm working an outage at a power plant 300 miles from home. The RCM bolts came in two days before I left so I haven't actually tried it yet, but it did hand cycle much smoother. Once you get your pistol, if it has the original MIMS bolt, I'd highly recommend changing it with a RCM from HK Parts. I'd check roller size and bolt gap. The two V89-40 SD kits I bought had undersized rollers. My CA89-40 ran for about 400 rds. The bolt got to have so much drag that the rounds would just dribble out. That is using my sear and a stock. I'd think in a pistol configuration, would be that many more function problems. It is harder to hold this style of pistol firmly than it is to shoot it as a shoulder fired carbine. After changing the bolt, it it doesn't run, I'd send it to Jeff (ghilliebear2000 here on this board).
Once you get it, another thing to check for is the size of the chamber. Some of the .40 caliber chambers are over sized. The round can wiggle around in the chamber. This can be another contributing factor for function. Good luck with your .40 caliber pistol.
Scott
