DescriptionDesign for AR15 Upper receiver fix ormaintenance use, made by engineering polymer material,durable and light weight. With this kind of material it can hold upper receiver tightly without damage it.Features- Color: Black. - Material: Engineering polymer. - Size: 12 x 8.6 x 6cm. - Design for AR15 rifle upper receiver, perfectly fit. - Made by material, will not damage the upper receiver. - Fit for Handle AR15 upper receiver and flat AR15 upper receiver.Warm Tip: Dear buyer, Due to lighting effect, monitor's brightness, manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand! Thank you!