My understanding is that the parts for Turkish M4's are mostly made in the same factory, the different companies all have different levels of QC. I have not compared the two side by side. I have owned 2x Sulun clones. The first one was lemon - it was exchanged hassle free and the second one ran like a champ. I was advised that the lemon had a minor repair done and ran fine afterwards.
If you are bent on buying a Turkish shotgun, buy it from Delta Mike, they have the best warranty and product back up.
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