[V3RTIGO]

i can recommend this:

air seal nozzle with o-ring: http://airsoftpro.cz/eshop/product_i...22&language=en

hop up adjuster kit (u can use standart nubs in there): http://www.wiitech.com.hk/eshop/prod...roducts_id=430

and both are shipping world wide.