One of 2014's hottest new products, Remington's R51 is the 198-year-old company's first attempt at a compact personal protection gun since the John Pedersen designed Model 51 was discontinued in about 1926. The .32 or .380 ACP Model 51 was an advanced design for its day, having excellent ergonomics and slim, streamlined lines.
The new R51 is a compact carry gun built on an aluminum frame that measures a mere 6.6" long by 4½" high, and is less than an inch across. It uses a form of delayed-blowback operation called the Pedersen lock or an impingement lock. It represents a combination of features chosen specifically to make it extremely easy to point and shoot. Its grip angle has been optimized for rapid target acquisition. The low bore axis design boosts this effect while also aids in offering up to 25 percent less muzzle rise at the shot for faster, more accurate follow-ups. For comfortable carry, it features a lightweight aluminum frame with rounded edges.