1.Only install onto 0.75 inch regular barrel and standard gas tube
2.Diameter: 19mm (0.75 inch)
3.Length: 25.4mm (1.0 inch)
4.Overall height: 37.5mm (1.5 inch)
5.Weight (net): 43g (1.5 ounce)
6.Use supplied hex hey to fasten and release onto the barrel
7.High quality Steel Material
8.Shock proof designed for real fire caliber1.Only install onto 0.75 inch regular barrel and standard gas tube