Firearm attachments, namely, modular external rail systems for attaching accessories to firearms; Firearm attachments, namely, modular external rail systems for firearms; Firearm attachments, namely, mounts for attaching accessories to a firearm; Firearm attachments, namely, mounts for attaching ancillary equipment to a firearm; Firearm attachments, namely, mounts for attaching grips to a firearm; [ Firearm attachments, namely, mounts for attaching laser pointing devices to a firearm; Firearm attachments, namely, mounts for attaching lights to a firearm; ] Firearm hand guards