What to look for..

[Commissar_Loki]

I'm getting a used minimag, but I'm new to mags, What should I look over when I get it, any parts I should check out and such? Thanks for reading this.

[PyRo]

You can check to see if the bolt and sear edges are worn, other than that just shoot the thing.

[bsolomon]

I would also say, just look for any signs of obvious abuse or attempts to alter the parts (i.e., milling, drilling, etc...). Barring that, for the cost of a repair kit, which contains mostly o-rings and a reg seat, you can pretty much rebuild the valve completely in just a few minutes. So if it basically works, but leaks a little, or is a bit inconsistent in velocity, you can feel pretty good about buying it and just use the parts kit to get everything going smoothly again.

[PyRo]

Yeah, some shmuck milled down the back of my valve to fit a tounrnement lock on there, so now it looks wierd, but doesn't adversly affect it.