Spring Tensioner for MP5 Magazine

These solid rubber spacers compress the springs of MP5 magazines that seem to struggle feeding reliably, enabling them to feed heavy BBs consistently. Ideal if you’re running an HPA adapter and heavy BBs.

Three spacers come in the package. The rounded edge goes towards the spring, and the flat-cornered edge towards the end of the magazine well.

Dimensions: 6.30×3.15×0.24″

Installing these spacers is not easy to perform and requires some dexterity. Having these inside of your magazine will reduce your BB capacity.