The Leupold 170749: Mark 4 Tactical Base exemplifies Leupold\'s commitment to solid, trustworthy design. Crafted from steel, this base readily accepts both 8-40 and 6-48 screws, thus ensuring its versatile compatibility with a broad spectrum of contemporary tactical firearms.Each model comes furnished with both screw styles to meet your needs. It is designed to fit with Remington 700 long action rifles. This particular model boasts a 20 MOA slope and is enhanced by a sleek matte black finish.