No Dak Spud makes receivers, so if there are no other manufacturer's marking on the pistol in question, then you're probably looking at a kit build. Kit builds can be good-to-go, or a complete disaster. It all depends on whether or not it was built right.
Honestly, as pistols I find them to be pretty much useless, that is, unless spraying rounds downrange with little regard for accuracy is the name of the game. I fired mine once while I was waiting for ATF approval of my SBR conversion. I just needed to make sure it functioned. Very awkward to shoot in pistol form, to say the least. Lots of people will tell you to buy a sling adapter and use a sling to push the pistol out to create more stability (such as the technique used for the stockless MP5K). If you are able to SBR it, I say save the cash and file your Form 1!
I SBR'd an M92 this year. I always wanted a Krink, but I prefer the availability and stateside commonality of 7,62x39 over the 5,45 round. The M92 is longer than your run-of-the-mill Krinkov, but the 10" barrel does really well with the 7.62 round. The velocity loss isn't enough to pose any problems, unlike what you run into with 5.56 Nato SBRs.
The Serbian M92 PAPs are nice guns, but I did find that mine needed some massaging to smooth everything out...
- Rough lower hand guard metal was sticking in the receiver. Hand guard came out, but the metal tab did not. Filed down the offending edges...problem solved
- Lower hand guard lever was impossible to open and close. Smoothed out the groove on the barrel with a file and sanded down the front end of the handguard for a better/easier fit.
- Gas tube plunger required a hammer and punch to disengage. I took some material off of the angled cut on the gas tube and re-blued it. Problem solved
- Hammer spring was awkwardly bent and was sliding off the trigger legs. This was an annoying process of re-bending and re-installing until I got it to sit properly.
That said, they are factory assembled AKs with foreign cold hammer forged barrels. The barrel isn't chrome lined, so it isn't a gun you want to neglect and abuse when it comes to the bore. The gun is as accurate as my MP5 at 50 yards, which is impressive to me.
All said and done, with the stock and tax stamp, I'm at around $1k, which to me is a bargain for an SBR of this quality. I did the drilling and tapping of the rear trunion myself, which isn't too hard if you have a decent workbench, drill, center punch, and drill & tap set.
Hope that helps!