Yes, a hicapa hopup would work in a 1911,
You have I assume a WE as you're describing the plastic bit that has a screw thru it, which keeps the hopup from sliding past the outer barrel.
You can replace it another piece of plastic, or a square bolt that fits the screw you have.
As far as replacing the post that the wheel sits on, this I can't help you with, sorry.
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Last edited by pusangani; March 14th, 2014 at 11:51..
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