nost: Where are you geographically? If you’re in San Diego proper, I’d check out Accuracy (if they’re still in business). I used to have some buds on SDPD that swore by the place.
In North County, there’s a decent place in town (Fallbrook), Cal’s Custom Guns and one in Temecula, Guns, Inc.
Accuracy should have the 870 Police as a stock item, since they do so much work with SDPD and SD Sheriff’s Office.
