Does not need - ProMag Glock 43 9mm Magazine

At first I thought I would need to break it in but after shooting it it just kept jamming in jamming it would get off around and then I would jam and a wood stove pipe then it would jam don’t buy it It’s not worth the money just get the six round-the-clock clips extend them if that’s what you’re looking for this was not worth the purchase I really regret it as it could’ve broken and damaged my Glock as it did stove pipe in and I had to take it to my local gunsmith to remove a scribble bullet