I purchased this for my E&L AKs74u and it’s too short to fit. Perhaps this was intended for LCT and GHK. This was never mounted or used. Comes with mounting hardware that holds it to the outer barrel of your AKs74u. No additional shipping cost. CNC machined aluminum construction. Hard-coat anodized in black colour. Low-profile design allowing co-witness with most micro dot sights. Drop-in replacement for Gas Tube on AKS-74U and AKMSU series.