Looking for Riflescope Mounts and Bases? Warne Steel Extension Remington 700 Rear Extension 0.700 Matte Finish delivers great quality for a great price. All of the features you need for a price you want from Warne. Don"t look further for Riflescope Mounts and Bases. Warne Steel Extension Remington 700 Rear Extension 0.700 Matte Finish has everything you"ve been looking for.