Use this 50-round capacity drum magazine to unleash a torrent of bullets out of your Ruger® 10/22 rimfire rifle. With double the capacity of 25-round magazines, you'll still be squeezing off rounds while others are reloading. The rugged polymer construction and stainless steel feed lips deliver a smooth and dependable feed. Black finish. Use only high-quality, plated-projectile, high-velocity, round-nose ammunition for best results.