ok well i can't speak directly for the CA model but i have a marui and will try and reply as best i can. Firstly, why did;t you just buy the new CA longer models if you wanted a larger forgrip? would have cost you alot less!
anywas that aside, there should be markings on your hop unit that say which way to turn it to increase hop. For my you just move it up.
as for iron sights, unless it's completely different from the marui and real steal, just use your hex keys to adjust the rear sight. simple as that. it can be adjusted for windage and elevation
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