If your looking for a suitable srs tech, you need to post here:
https://airsoft-forums.uk/forum/25-general-help/

Is anyone here a machinist or does anyone know a machinist they'd recommend? Have tried LCs but have been getting no response.

OKAY, back again about systema ptw stuff.
I'm trying to make one of the long m16's with the grenade launcher. My issue is I know systema ptw guns use real steel proportions, so I'm worried if I buy an AEG style front end (not the outer barrel just the launcher and top hand guard part) just to get the grenade launcher and made by E&C see attached I'm just wondering if the fittings to get the nade launcher and hand guard/heat sheild would be out of spec to fit a real steel D-ring and front gas block 

Okay so I think I made the deal of a lifetime thanks to me and the guy I got this from not having a clue what we had on our hands.
 
So. I just grabbed what I thought was an airsoft m16a2 with no batter and only one mag. But i wanted a metal bodied carry handle m16 thing to make a retro build. But the mags looked weird, and I had to adjust the hop with a little grub screw in the mag well.
 
Turns out I just bought a Systema ptw m16a2 for a steal.. Anyone know where I can get mags for it in the uk? Otherwise, I'm going to have to order them from Hong Kong and the UK retailers I looked at only have the modern style mags at £30 a pop. 

Why are these system PTW things so expensive? The version I got looks to retail for $1700 American?

Scammer👋🏿💩