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In return, this is the Spring SVD Technical manual, which modify from the offical company's guide. I will add the Sear section in the future.
Note: it use standard AEG springs! Not those VSR/APS2 long spring.
Systema M140 spring: (I know what I am doing)
350 fps @ 0.2 BB :-D
Stock spring (yes, which right out of the box)
490 fps@ 0.2BB (guess what fps will it be if i put this in AEG :!: )
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