MechLabs Roto Pro CNC Buckingless Hop-Up Chamber for HPA Engines HIP UP UNIT For M170 spring and other

For M170 spring and other high power upgrade

non-functioning replica

Compatible with both V2/V3 gearbox

to carry such AEG Rifles

Internal BB retention mechanism reduces BB loss during magazine changes

MechLabs Roto Pro CNC Buckingless Hop-Up Chamber for HPA Engines HIP UP UNIT For M170 spring and otherBucking less design eliminates traditional hop up rubber entirely Micro injected precision nub replaces bucking for backspin generation Enlarged contact surface improves BB stability and Magnus effect Extreme shot to shot consistency, especially in HPA builds High durometer nub material resists wear and deformation Eliminates common bucking issues (tearing, swelling, misalignment) Mechanically indexed self alignment system for perfect positioning