Very good quality barrel clamp - GG&G Barrel Clamp for GG&G Remington 870 Magazine ExtensionTube

This clamp is well made and fit my Remington 870 barrel and plus 2 factory extension like it was made for it despite description stating it would only fit the GG&G extension tube. I put electricians tape on the inner clamp where it touches the ext tube and barrel. Have shot several buckshot loads through it and the clamp shows no signs of slipping. It also did not cause a noticeable movement of the ext tube in relation to the barrel when tightened. Great product!