Polarstar - Jack V2 red outer barrel if you are looking for

if you are looking for an all in one full metal build (spec list below)

Fully Adjustable Butt Stock

This Variant of the MP5 is the PDW which is the Tactical edition

This sight is those awesome canted sights and rifles that are low profile on the rail

Polarstar - Jack V2 red outer barrel if you are looking forSimilar to its sister product, the F1, it replaces the original gearbox components with a programmable pneumatic system allowing for higher performance and greater reliability over a gear driven system. Although economically priced, JACK still retains the same performance and quality you have come to expect from PolarStar products. These engines have mag terminal wires inside package.