ZKK-601 front sight help please

[Gun]

Neat rifle. Great with a scope but not as accurate with the irons. The front sight (pin) is loose in the ramp. I believe I can improve on or repair that.
And it has the original front sight.
I would like to get an assortment of different height pins if possible.
What is available?
I would like to keep it original if possible. I like having iron sights for back up shooting or when then conditions dictate.
A hood would be nice also.
Thanks!