Retro Arms Bowden Spring for M249/M60/MK43 Magazine

Bowden spring is used for leading BB's in high capacity magazines, e.g. machineguns.

Retro Arms is a Czech manufacturer that is specializing in spare parts for airsoft replicas. Their main products are made from durable aircraft EN AW 7075 aluminium and machined on precision CNC machines. They are go-to company if you are looking for highest quality CNC gearboxes, speed triggers, hop up units and many more inner parts