This 1x magnifying mini red dot sight is made in Japan. It is a closed tube system with an integrated weaver mount. The MRSL sight is using renowned Japanese optical technology and craftsmanship. It is made of high grade alloy, providing superior strength and is rugged built. This sight is parallax free, waterproof and has click adjustments. The red dot is perfect sized with 3,5 MOA. Optimal coatings offers a perfect image. A great sight for quick shots for hunting or on shooting range.