For sale is a Custom made Retro Arms M4 build. It was built completely from scratch. I am selling it due to only using GBBR-s now. The gun has been fielded 5 times, has been fine tuned and works like a dream.
Only trades/swaps I am interested in is a TM MWS package or parts for it.

Kitlist:
Retro Arms parts:
- Cnc Skeletonized Receiver (298€)
- Cnc Split V2 Gearbox (9mm) with integrated hopup (167€)
- Cnc Nozzle (4€)
- Cnc Piston head (17€)
- Cnc tappet plate (16€)
- 14.5 steel teeth piston (13€)
- Cnc Steel Cylinder (17€)
- Cnc Cylinder head (14€)
- Cnc Trigger type D (9€)
- Cnc Gas Block type A (23€)
- Cnc Forward Assist type A (9€)
- Cnc Magazine catch type A (18€)
- Cnc Fire Selector type C (9€)
- Cnc Fire selector cover type A (3€)
- Cnc bolt catch type A (5€)
- Carbon outer barrel type C (62€)

Other parts:
- Gate Titan set + Program table + usb converter (145€)
- Prometheus 407mm inner barrel (70€)
- Tornado M110 Spring (7€)
- Lonex High Speed Gear set (60€)
- ASG Blue Motor (60€)
- G&G Green Hopup Rubber (6€)
- G&P Stock tube (25€)
- Pts Magpul M4 Grip (30€)
- Pts Radian Charging handle (39€)
- Pts ASAP Sling mount (29€)
- Pts Rainier Arms Extreme Compensator (35€)
- MFT Style Stock (20€)
- NSR Style Handguard (100€) Needs some tweeking, there is a gap between the upper and the handguard. Dont have the time to bother with it, so it goes as is.
- MOE RVG Keymod Grip (10€)

Accessories:
- Turnigy Nanotech 11.1V 1200 mAh Lipo Battery 2x (25€)
- Ares Amag Midcap magazines 3x (35€)

All together 1444€ if you want to buy it from a shop. Plus shipping fee, waiting time and you have to put it all together.

I am gonna sell it for 840€ (720£), thats with shipping and everything included that you can see. Customs fee is covered by you. 
Not gonna answer part out questions.
Swap/Trades: TM MWS complete package, parts, accessories. NOT interested in anything else.
The gun is located in Hungary, EU. Will be shipping with GLS.
If you have any more questions, feel free to ask!