For shops in OC there is:
Turners Outdoorsman.
www.turners.com . They have decent prices on sale items, and are located all over Southern California. Sometimes there are knowledgeable people around, other times you get some dimwits, but all in all a decent store.
The Gunsight: Located in Fullerton, this is my favorite shop. Pretty much one of the few mom and pop shop left in Orange County. Best prices I've found, and best consignment pistol selection around here. George is a great guy, and a 1911 (specifically COLT) fanatic. Pretty good gunsmith
Flag Guns: Decent people, small shop. Located in La Habra. Sell FAB 10's, used to have some .50 BMG's for sale. Not much to look around at.
Cliff's Gunsmithing. Located in Santa Ana area. Rude people. Not very helpful. Only place in OC that sells Jennings and Ravens Priced pretty high though I did get a fair price on a 686-4. In the end, the transactione experience does not qualify me to give them any more business.
Grant Boys: Newport/Costa Mesa. Another hunting fishing store like Turners. People are nice but the prices are up there.
Fowler/Stockade: Best selection in OC, HIGHEST prices. Some of the people running that store are just plain mean. I've gotten stares, looks and some aren't very helpful. There are a few in there that will give me the time of day and are actually helpful, but for the most part the people aren't all that nice. Good selection for reloading supplies.
Ade's Gunshop: Ade's a GREAT guy. Located in Orange down the street from Fowlers. Spoke to him once, and he's a genuinely caring guy. Decent selection, decent prices. If you wanna order something I'd go to him or George at The Gunsight
Army/Navy Surplus store in Orange Circle. High prices, not much selection, but fun to browse thru for all the military surplus gear.
ARMS USA. Nothing of a selection. Located in Anaheim. Used to be big on .50 BMG rifles, but now I have no clue what they sell anymore. Must have membership to buy from them. Kinda odd store policy.
EVAN's SHOOTERSWORLD. What a d***head. I'm not even gonna get into him, it'd take too much to type. But save your time, dont give him business. He doesn't deserve it.
On Target. Decent prices and selection. Located in Laguna Niguel. Best indoor range in my opinion.
Good Luck!