Mian Spring For AEG V2/V3 Gearbox M75 M90 M100 M110 M120 M130 M140 M150 M170 M180 M200

Features:
*Made out of Stainless Steel. Increased tension and durability. 
*Non-Linear Spring Design,Variable Tension. Reduces stress, wear and tear for your Gearbox.
*Easy to install part to increase your stock FPS.
*Tension lasts 50% longer than other leading brands.
*Designed for all version Airsoft AEG gearboxes.

FPS Ref.：

M75≈220-250fps

M80≈240-270fps

M85≈260-280fps

M90≈280-340fps

M95≈290-370fps

M100≈320-380fps

M110≈330-390fps

M120≈360-450fps

M130≈420-500fps

M140≈450-550fps

M150≈480-600fps

M160≈530±20fps

M170≈560±20fps

M180≈595±20fps

M190≈625±20fps

M200≈650±20fps

Above Parameter has some error ，Only For Ref.