Airtac CRBN HPA upper Gen. 4 Color 155mm:Silver - 155mm

Airtac CRBN HPA upper Gen. 4 Color 155mm:Silver - 155mmIntroducing the Gen 4 HPA CRBN Uppers a new level of durability! Airtac CRBN HPA Upper for M4 AEG bodies. Turn your AEG into a HPA speedsoft monster build with this fancy upper from Airtac Customs USA. Designed and made by Airtac Customs in USA, this is a nice uppper that combines style with efficient ergonomics. Made from a carbon fiber tube with a custom designed and 3D printed chassis that includes fiber rod front and rear sights. And it goes

air efficiency and reliability

Possibly also fits other platforms

Compatibility notes:

dwell timings and adjustable nozzle power

wipe with a wet cloth and let dry

On the top are differently spaced holes and adjustable pins

thereby lowering the total gas volume that gets into the barrel to accelerate the BB

Save on gas with your GBB

There should be some resistance

A highly recommended upgrade

Turn your AEG M4 into a modern highspeed HPA marker with this drop-in kit

Easy to install QD fitting for HPA engines