Does anyone know Since I can by a bare Remington 700 receiver from Brownells can I buy it and make a bench pistol out of it.

Yes you can. As long as it has never been barreled and is just the action, you can legally do it. Just to be safe make sure you keep the receipt showing you bought it as an action only. Back in the early days of silhouette (sp?) shooting, that was a very popular thing to do.