u/AtrapusBlack

I gave my SA-H12 the other day to customize it and the guy who's gonna do it showed me that the original hop-up unit was broken and needs to be replace.
So I had a little idea: replace it with a Specna Arms TDC Magnus hop-up unit with a Maple Leaf 60° (yellow) Macaron bucking and a Maple Leaf Omega silicone 50 (green) nub. In total, it should cost me 30€.

Mind you, I live in Italy and here the law for airsoft replicas is that they can't be over 1 Joule, else they aren't be classified as "toys". That's why I chose the 60° bucking and the 50 nub.

Tell me if this is a good idea or if there might be some problems with compatibility or performance. Thanks!

The handguard and the barrel are a bit wobbly and I need to get them checked. However the only person available right now that works on replicas told me they have never work on a 416. So I want to know how to take it off.

It looks like there are some threaded sleeves used to block the principals screws from moving. Does any of you know if this sleeves are the type that have only an internal thread or that also have an external thread? How can they be removed?