This Remington Sportsman R51 has a short thumb ramp and a grooved blade flat.
The R51 Sportsman Series from Remington is rugged and hard working, and is the knife you'll turn to again and again. The 440 stainless steel drop point blade has a black coating and ambidextrous thumb studs for a fast, smooth, spring assisted opening. The black anodized aluminum handle features the Remington "R", and has finger grooves and texturing for enhanced grip and security. The liner lock mechanism keeps the blade safely in place while it's open so you can work with confidence. The handle also includes a lanyard hole, and a tip-down carry pocket clip.