Hey, might be worth noting that if your semi-auto RIF is in excess of 2.5 Joules or your full-auto RIF is in excess of 1.3 Joules you will be unable to post legally as your guns will be considered Firearms.
Other countries have higher legal limits than the UK, so you may want to downgrade them...
Hey, see build at Dave's: https://www.davescustomairsoft.co.uk/DCA-LCT-MC51-G3-Shorty-Custom
I'm not super familiar with this model but it looks like its possible.
Your search term is "M-LOK MP5 Handguard".
Midwest Industries make M-LOK rails for MP5-type...
Group of 2-4 here, depending on dates.
I've been looking for a site around Wellingborough as my best friend lives there and he is sick of visiting me in Cambs to play airsoft!
Please include me in any related comms, I'm very likely to attend with min. 2 people.