Help! need KRYTAC KRISS Vector LE Spring advice

[CRKid]

Hello Airsfters

Got a new KRYTAC KRISS VECTOR LE and its now doing 315~320FPS with 0.8~0.9J with 0.2BBs, the site I play allow AEG with max 1.20J. 

As it only ask under 1.20J with ANY BBs and ANY SPRING, want to ask the best spring and BB combo in this safety rule limit. Thankyou.

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[Guest]

To start with, 1.2 joules is 1.2 joules, your FPS will have to be 360 or less with 0.2 bb’s.

As it’s a seriously fast quick change spring (30 secs MAX) try a few and see what you get.