Set of 5 Mid-Cap 70 BB Magazines for M4/M16 Replicas - Grey

When i first saw this i thought "Wow 5 magazines for only 25 euros, now that's a good deal!". I also hoped the quality woulf be good as Specna Arms has not dissapointed me before. On the outside they look and feel fine, but the problems start when you try to make them work. I am not sure if the spring is weak or the plastic is too tight and uneven on the inside but the magazine are barely strong enough to push out the bbs. On average they feed succesfully once out of 5 shots. I realise that there is a reason they are cheap but they barely work if at all. I will try to disassamble them and see if i can solve the issue but i would definitely not recommend buying them