Worker MOD Metal Stefan Breech Kit is built for perfection using the highest quality precision-machined computer numeric control (CNC) aluminum that will improve modded and stock foam dart blasters. Its parts come in a beautiful anodized aluminum finish that keeps them free from corrosion, provides a hard and mostly scratch-resistant surface, and in a beautiful color Silver.

The kit is the ultimate AF Nexus Pro internals modding kit. The re-engineered bolt and breech maximize the aerodynamic efficiency that transform the coil power into rapid air flow, the reinforced Barrel adapter ensure the reliability even in rapid firing and durable use. Together with the Worker metal rail enable your blaster tactical advance. The extended metal barrel maximize gas usage, with the scar barrel (not included) further enhance the dart spinning and accuracy.

Advance modding skill does require, you need to remove the plunger, bolt module and muzzle on your slingfire and replace this metal kit. This kit compatible to Short darts and Standard darts.