Buy a good one, cry over the price but never the quality. LOL. Let's also say I have seen more than one and less than 100! Plus I have built a few! Today at the range a guy could not get his SW sport to feed M193 from a magpul magazine. Buy the best tool you can afford.
This goes without saying, but the OP did set a budget of $600.00. In stead of grilling him for that, why not make a meaningful contribution here? If you don't have experience with AR's in the $600.00 price range that's fine, but then don't comment on it.
