My new rig and I need some more info please

[samrcho]

I have never owned a rifle before and thinking of buying the DM next weekend. I know if comes with detachable magazine that holds 4.

I would like to know if I can buy extended magazine for the remington 700 DM without buying a magazine conversion kit?

This would help me decide between the ADL Varmint ($350 @ Di3k'$) and the SPS DM ($550 @ Bass Pro). Both in .308.

Conversion kits cost $250+ but if I can just get an extended magazine for the DM, I would be saving money.

Any advice will be appreciated.

Thanks.