To install a sling strap assembly, we recommend the use of a fore-end screw swivel assembly or barrel band. These assemblies can be obtained through your local dealer or an aftermarket parts company. Never drill the fore-end on a Model 7400. If you install a swivel stud in a wood or synthetic butt stock, you will void your warranty on the stock. If you choose to have them installed, we recommend that you have a qualified gunsmith perform the service.