For what it's worth last year I bought a 52-1 and it came with one magazine, the gun functioned fine. I bought 5 more mags 4 on E-bay (two NOS in their original packaging and two used ones as well as a used one from a dealer. Of the 5 I bought 3 had issues including the NOS ones. Mostly the issues where the Feed lips where to tight. My point is that these beasts are fussy and require tuning to make run right. At least in my limited experience.