I have a remington 700 bdl with the internal magazine,And i was wondering
if it can be converted to accept detachable mags?

Do you mean you have a hinged floorplate?
any 700 can be converted to a detachable magizine if your willing to spend the money. estimating cost about $200.

You can find the retro kit in Brownells. They are about $200 bucks. Too much in my way of thinking to do. Spend $200 on binos or add that and trade in your scope for a better one if you don't already have a good quality scope on the rig.