Yeah the TM MP7 comes with a silencer adapter, it's CCW if I remember correctly.
Parts list from that gun then... sight is a replica of a Trijicon ACOG, looks like the 4x32 with a micro red dot sight on top. link to the real one:
http://www.trijicon.com/na_en/products/product2.php?id=ACOG&mid=4%20x%2032
China produce many copies, some are better than others and magnified ones will set you back a few quid. The Strike Systems 4x32 ACOG is the model I personally own and I find it to be very usable, your mileage may vary. Personally wouldn't put it on my MP7 as I tend to use a bigger gun in woodland which is where I like the magnification for spotting. My preference for a sight on the MP7 is the fantastic Aimpoint T1 micro on a high mount, these can be had on eBay for about £30.
PEQ box is a PEQ15 replica, easily acquired from all manner of chinese/hongkong retailers, the Element PEQ16 is particularly good.
If you're after a tac light instead then the 'legit' choice is the Surefire M300 mini scout light, thankfully Element do a really good replica which is still very very bright. Though obviously not as bright or as durable as the real Surefire one.
Silencer on that one is the Tokyo Marui full auto tracer unit, I have one on my MP7 and it's the dogs bollocks for shooting glowy plastic balls at people. Longer ones are no problem, in fact Madbull/Magpul do a whole series of quick detach ones designed specifically for the MP7, so if you want the look when you're fannying around in the safe zone/posing for photos but want your gun short and mega pointable when playing... you can do that too. Link:
http://shop.ehobbyasia.com/ufc-silencer-with-flash-hider-for-marui-mp7a1-gbb.html
Be careful with buying QD silencers for the MP7 though as a lot are designed for the KSC/KWA/Umarex MP7 and they're NOT cross compatible.
That's all that has been done to that one, they've removed the rails from the sides of the hand guard, very straightforward on the Marui GBB as each one it just held on with a bolt (4mm allen key).
Here's a photo of my MP7 to give another perspective on how they can be set up. Please ignore the tape on the silencer, it's holding on one of the batteries for the tracer unit as I'm paranoid that if I leave them all in they'll go flat!
Sight is an Aimpoint T1 replica, tac light is an Element M300 scoutlight with the pressure pad attached to the pistol grip and the silencer is a Marui tracer unit.
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