Ohio Rapid Fire was giving away "free" Vulcan receivers with Yugo M85 & M95 kits. I got a couple "free" ones. They are absolute out-of-spec junk and worth almost what I paid for them. For a Yugo "mumps trunion build, get a NDS. There really isn't any other 100% receiver option.
Here is a review I did of the Vulcan vs. NDS about a year ago, with pictures
I have underfolders from both makers. I have posted in the past in defense of Vulcan AKM receivers. I bought and used a handfull and was generally satisfied with them. I don't have as high an opinion of the Vulcan Yugo receiver. My opinion is from handling the receivers only, I have not built with a Vulcan Yugo type.
DCI is as good as it gets in receivers right now IMO.
The Vulcan has some problems. I probably will never use the two Vulcan Yugo underfolders I have because they are too far out of spec for me. They could be made to work though, I believe. The two Vulcan receivers I have are freebies included with ORF M95 kits.
Here are some poor pix of a DCI vs Vulcan underfolder. The Vulcan receiver is from ORF. The Vulcan originally had quite a bit of scale on it but has been polished clean with a wire wheel. The DCI is as I received from NoDakSpud. The DCI is made of .063" metal - the Vulcan measures about .060". Both have the manufacture info on the bottom in front of the magwell cleanly stamped. The Vulcan is stamped for two calibers, 7.62x39 and .233. I assume .233 is a misprint for .223. The lower rails on both receivers are in proper position - DCI perfect, Vulcan slightly low but within tolerance.
The first image shows the receivers side by side, bottom to bottom. This shows the Vulcan as being longer, having oversize rivet holes for the rear trunion, and as having a AKM style pressed dimple at the selector hole.
Vulcan top- DCI bottom
Fronts side by side. The Yugo "mumps" bumps are shorter on the Vulcan. Both will fit a Yugo trunion though. The DCI rails "float" a bit more into the mumps pressings because they are longer. The magwell dimples differ. The Rivet holes on both are correctly sized. The Vulcan rivet holes needs a little "egging", the DCI are dead on.
Vulcan top - DCI bottom
The bottoms showing the trigger and pistol grip cut outs. The Vulcan is totally incorrect for a Yugo and will need a AKM type pistol grip nut to work.
DCI top - Vulcan bottom
Right side front. Again, different dimples. The DCI has selector notches and F & S marks. The Vulcan is smooth. Spot welds look very similar.
DCI top & Vulcan bottom.
Top view DCI top, Vulcan bottom
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