Having done up a replica G3 from an old TM version made from parts.  I wanted a scope on it, but didn't just want an ordinary scope and didn't wanna pay for the scope that goes with the gun in the real world.  Anyhoo, I started with a cheap 4x40 normal scope and cut it down.  Emptied it out and put a bit of 30mm pipe on the back.  I had a TM MP5 claw mount and cut the top off, filling any gaps in with milliput.  A friend 3d printed some spacers and I glued them to the scope I was using.   I glued various spare caps on and put a real G36 3x inner scope part to have some sort of sight picture through it.  Sprayed up black and flip up end caps to finish.    A bit later on I decided I wanted the more modern type lower that I'd seen with the German soldiers in Afghanistan.  I used a cheap MP5 Navy lower and filled in the embossed bullet symbols.   Sprayed it with bumper paint and drew on the selector markings.  I bought a real selector lever from D&B Militaria and drilled a new hole to slot it right through to the other side.  It may feel like a long winded way of making it but apart from the lower I already had and the selector which was only a couple of quid all it cost me was a bit of time.  

To be honest Rob, ages back i googled your username, something I've done with a few unusual sounding usernames, wondering what the meaning was or where members sourced them from, & yours mentioned your musical history, originating from the bristol area if memory serves me ?   I'm not a stalker, honest😜

Saw this thread and thought I'd share one of my projects I'd done a couple of years ago.  Nothing too fancy but it's unique as I've not seen any other airsoft replica Turkish HK33 looking replicas as accurate tbh.   Classic Army Base gun.  Slim Handguard made from a real G3 Handguard.  Railed Handguard made from an old springer shotty and an MP5 3d printed handguard.   The GL front end was a cheap battery box cut to suit with the handguard made from foamex board.  The cocking handle was fashioned from foamex board too.  The lower was a standard MP5 one with the embossed bullet symbols filled in.  Repainted in OD then the new bullet symbols drawn on freehand by marker pens.   Again, nothing too fancy, but I like the finished job.