No tilt= With some cheap magazines the follower will get cocked in the magazine and will not feed. Most all quality magazines have a no-tilt follower to prevent this. The follower is the plastic piece on top of the spring in the magazine which the ammo rides on.
I know you will hear groaning here about the price increase, but prices have skyrocketed on gun stuff. I had the opportunity to buy several Glocks, which went up 20% in wholesale price. I bought all I could (4).
It was either buy them and sell at a higher price, or have nothing to sell. It still bites to pay wholesale for Glocks what I used to sell them for. It is called, supply and demand.