mp5a4

Good question, mine is about 18 years old, I'd assume it'll be the proline, and the newer sportline will be different.

Classic Army is probably the best TM spec G36, great externals and mostly in spec, gears are a little cheese metal and can strip but easily replaced. Fits a real steel handguard with no mods too, JG always seemed a little different shape and needs some persuasion for it to fit.

+1 for Guard Dog Evader 2s, pretty slim for fitting over glasses and looks okay. No issues with fogging. Have you looked into Rx inserts op?

Me again I've not seen any replicas of the B&T sling mount, you could probably do a diy replica if you had basic measurements (B&T has a wireframe of the CAD on their webstie iirc) A HK sling mount should be kosher too iirc, and may be easier to find.

Note you will need to change the selector switch as well. The Din markings should be correct but I've found "Full Sans SC 70 Medium" to be closer to the actual markings. I've considered using high quality stickers (like used on simracing wheels) so they can be aligned around the selector switch before removing the upper adhesive cover but not sure they would last long. If you have a TM recoil shock or VFC GBB, you can buy an OEM trigger housing with SEF markings already

No, the TM released after the other brands for the M&P and each platform is completely unique.

They're worth more than the EPM ones to the right person. They're the only replica of the Magpul PMags so KSK impressionists love them. Prices fluctuate from probably £20 each to £50 each as they're so rare they don't come up very often and people are happy to pay silly prices, hence being hard to value. Occasionally they come up cheap (I paid £70 for the 5 I have) so depends how long you want to sit on them ?

A shim and a MOSFET with precocking will probably give a nice boost. Quite a few options for a V3 gearbox and easy to open it up

Do you have the .STL/.stp file? You could try JLCPCB

XT60 connectors are pretty nice, quite big though

Sure if you want to paint it for aesthetic reasons for ahead. You have a Realistic Imitation Firearm and you can customise it as you wish. As other said, you can leave it as is too, possession is not regulated and you already possess it

That's the law, but yes, a lot of retailers don't adhere to it, and you personally won't get any problems with buying one of those 43% a bright colour (pistol slide for example) IFs.

Plenty of JPC type carriers (Modi, Flyye etc) for that, maybe even get a beaten up real one for that. Depends what 'look' you want.

Unless you're making it less than 51% a bright colour and turning it into a RIF. you can modify it how you please.

Yes, just buy it and it shows you the fees, often you get a VAT refund a few months after too I've bought some gun 'accessories' and similar, nothing that looks like a rif though. I'm pretty sure Amazon has their internal channels for import anyway so shouldn't have any issues.