Remington 700 Long Action Detachable Bottom metal. Works with 300 Win Mag or 338 Lapua Accuracy International mags. This Bottom metal assembly allows the use of AICS magazines in your Remington 700. Install is required, and we can provide inletting and install services as well. Installs are free at CDiPrecision, so click Install option and send your rifle in for install. Easy and fast. 3 week turnaround or faster. US Addresses only. Mags Must be purchased Separately.