Actually, whiles on this topic is there much point using radios for CQB (I've seen many people using them in CQB). If so, would the motorola be sufficient? or are radios useless indoors anyway?
Nah, PMRs are perfectly okay indoors, even cheap ones send and receive just fine through quite a few walls. For example, I have a pair of BellSouth T-388 PMRs, and they're about as cheap as you can get (I paid 13 quid for the pair, brand new, off Fleabay). They too are only a measly 0.5w ERP, but they will quite happily transmit through several floors of a large building and two or three miles when outdoors in reasonably decent line of sight. I bought them so that I could hand one to a fellow player if I ended up on an impromptu scratch team at a skirmish. Feature-wise, those T-388s are surprisingly good considering they cost about the same as a round of drinks, they have loads of channels and memory, CTCSS, monitor, scan, call modes, voice activation, roger-beep, power saving modes so the batteries (four AAA) last ages, you can use a headset with them and a remote PTT, they have a built in LED torch (not great, but it works). Most importantly, the sound quality from them is actually not bad at all, very clear in fact, which is the real big deal with PMRs rather than carloads of features, as you don't want to be having to say: 'Say Again' loads of times when someone is shooting at you. For that kind of money - 7.50 each if you split the cost with a mate - you'd be daft not to get a pair of them if you don't have a radio and don't want to spend a lot.
As far as CQB is concerned, PMRs are incredibly useful. Let's say you want to storm a large hangar building from two different entrances simultaneously, and those entrances are on opposite sides of a the hangar. You could agree to commence the assault at a specific time assuming you have synchronised time, but if one fire team cannot get into position, or the situation changes, then you are asking for trouble, with a radio, all you need to send is: 'go in five seconds' and get a response of 'affirm' from the other team and you know it's going to be a perfectly coordinated assault. If the situation does change, then you can report that too. It even helps with mundane stuff too; sometimes in darkened buildings, you can lose team members or get separated when a team member goes to respawn, and rather than stumbling about and shouting out the team member's name in the hopes of finding them, a simple radio call to rendezvous at a location will put your team back together with the minimum of fuss.