To murder civilians, their vast arsenal of Kalshnikovs each do a better job than a sniper rifle.
Sniper rifles are worth more than 50 Kalishnikovs and each round has to be loaded separately by hand.
Armour plated buses, tear gas and water are even less effective.

Britain has no blame for what is going on in Homs, but you only want to talk about Britain.
I will argue the politics of arms sales with you, but not on this thread.
If you only want to talk about Britain not Homs on this thread, you are talking to yourself now, you hate filled obsessive.