http://m.ebay.co.uk/itm/ACOG-Style-1x32-Red-Green-Dot-Sight-w-Iron-Sights-for-Airsoft-FULL-METAL-Scope-/222242237682?txnId=1816053567012
I just got this for my valken it works very well.
I tried skimming mine to basics but still ended up with a full chest rig lol.
I have my dump pouch on back of my rig on right. Then pistol holster and 2 pistol pouches. 3 m4 pouches 2 grenade and radio and 2 spare pistol mags on chest plate in admin pouch pocket.
that is my plan mate. i got this as a learning curve before i get a new proper gun. then i have a ground knowledge for repairs. then when i have mine my son will be using this one for a bit. i like the m4's so most bits i buy can be transfered over to the better one.
the metal body will be the base of my own custom build.