The M-LOK Exterior Forend Weights from Tough Tactical Tools are a great way to add weight to your rifle to improve balance and reduce recoil. These weights attach to the exterior of a chassis or stock that is M-LOK compatible, making them easy to install and remove. They also feature QD sling cups, so you can easily attach a sling for carrying. These weights are made from a high-quality stainless steel with QPQ processing and are built to last. They weigh 0.35 lbs each, so you can add or remove them as needed to achieve the perfect balance for your rifle.