Although many have followed it

Military and Police communities worldwide

Dimensions: 270mm x 155mm

Comes in a hard shell gun case

Lancer Tactical Airsoft Irregular-Pitch Spring M130 [410-450 FPS] Breacher HPA Adaptor Although many have followed itSpecifications Brand: Lancer Tactical Material: Stainless Steel Muzzle Velocity: 360 450 FPS Color: Black Compatibility: All AEG Gearboxes Package Includes: 1X Spring Features Non linear spring coils puts less stress on gearbox Constructed from high quality anodized stainless steel piano wire for increased tension and durability Universally compatible with all airsoft AEG gearboxes 190% Increased spring power (estimate based on average power output)