Mechlabs XX-MOD HPA Drop-In Engine akm this nub solves a few

this nub solves a few problem with the normal MWS nub

1 x 4UAD Sealant pen

Replaces the original plastic parts found in the older series

Cool CNC Aluminium mag release from Airtac Customs USA

Mechlabs XX-MOD HPA Drop-In Engine akm this nub solves a fewThe new XMOD engine from Mechlabs is here! Turn your AEG M4 into a modern highspeed HPA marker with this drop in kit. This engine is ready for install into a variety of AEG M4 bodies. The X MOD engine is a fully mechanical HPA engine, that completely replaces the original AEG Gearbox. Featuring both semi auto and full auto, this HPA engine is sure to work for everyone. The triggerpull is amazing and feels like a high end AEG with crisp triggerbreak.