This is the Bigrr GBR Airsoft grenade which is speciel because it does not use gas or CO2

We often use this piston for our tunings as it is durable during normal operation but soft enough that it will break if the slider experiences problems with a ball getting stuck - so that the cost is made possible for the customer (a set of gears costs approx

Are you in need of a new hop-up chamber for your trusty old rifle from

There is room for 12 rounds in the magazine

TTI VSR Zero Trigger 111-1450-D This is the Bigrr GBRTTI Airsoft has made a Zero trigger here, which is a fairly new design that has a patent on their piston sear, which provides better action. It is built with a complete trigger housing in CNC metal, as this provides better precision and overall durability. It comes with an adjustable trigger.