It's been my observation that the ones I've seen at gun shows look pretty much the same as the ones I have that are 20 years old (aside from being criminally overpriced). Unless they are complete crap, they should work ok. They only have hold the ammo long enough for you to load your magazine. Assuming they aren't bent or deformed, there's really not much to go wrong.
MSgt, USAF, Retired
NRA Life Member
The hardest thing to explain is the glaringly evident which everybody had decided not to see. - Ayn Rand