If it is Manchester then there's a few good sites to play.
first and only the hive is the best CQB site imo.
There's Trojan in Stockport and Macclesfield.
Shortish journey's you can get to Anzio Camp, there's a few sites in West Yorkshire like the Stan, and then there's Liverpool, with Swat Fortress.
There are loads of woodland sites but they're not my brew.
Oh and ive been playing a few years and never bothered with a pistol. They're fun, but not necessarily needed.