A3 Industries Engagement Ring - Circular Hand-Stop 0.5oz. The overall design is ergonomically shaped with smooth radii on all surfaces providing a comfortable and secure hand-hold for the user. The minimalistic approach of a single finger ring allows the user to easily inpullin the firearm back into the shoulder providing more stability and control while also serving as a traditional hand-stop. Manufactured from Nylon 12 polymer. Only one M-LOK slot required. Specifications for A3 Industries Engagement Ring - Circular Hand-Stop: Manufacturer: A3 Industries Color: Black Fabric/Material: Nylon 12 Polymer Condition: New Mount Type: M-LOK Features of A3 Industries Engagement Ring - Circular Hand-Stop Lightweight and strong weighing only .5 ounces Ergonomic minimalistic design Requires only one M-LOK slot Great alternative to Vertical foregrips and Angled foregrips 1in ID ring diameter Package Contents: A3 Industries Engagement Ring - Circular Hand-Stop A3 Industries HS-101: Engagement Ring - Circular Hand-Stop 0.5oz