AEA hammer spring washers

[Fly]

Do any here know the thickness of the washers being installed to increase hammer spring pressure of AEA standard .25 cal rifles?

Fly

 

[JJMR794]

THEY DONT INSTALL WASHERS ON SMALL BORE CHALLENGERS, ONLY LG BORE

 

[zvslate]

On my 30 I just bought a similar sized but stiffer spring from harbor freight.