Methods and apparatuses for attaching devices to firearm

Abstract

Methods and interface devices for attaching to a firearm muzzle a suppressor having a rearward end with a threaded portion. The interface device includes an elongated body portion having a first end portion, a second end portion generally opposite the first end portion. The body portion defines a bore therethrough, and the bore defines a longitudinally-extending central axis. The first end of the body portion defines a threaded engagement portion configured to threadingly engage the threaded portion of the firearm muzzle. The exterior surface of the body portion defines visible indicia indicating a preselected position, whereby upon the suppressor being threadingly engaged with the threaded engagement portion and rotated such that the rearward end suppressor is at a preselected position relative to the indicia, the suppressor is properly tightened with respect to the interface device.

What is claimed is: 
     
         1 . An interface device configured for attachment to a firearm muzzle, the firearm muzzle having an extreme end defining a threaded portion, the interface device being configured for receiving a suppressor having a rearward end with a threaded portion, the interface device comprising:
 an elongated body portion having a first end portion, a second end portion generally opposite the first end portion;   the elongated body portion defining a bore therethrough, and the bore defining a longitudinally-extending central axis;   the first end of the elongated body portion defining a threaded engagement portion configured to threadingly engage the threaded portion of the firearm muzzle;   the first end of the elongated body portion defining an exterior surface; and   the exterior surface defining visible indicia indicating a preselected position, whereby upon the suppressor being threadingly engaged with the threaded engagement portion and rotated such that the rearward end of the suppressor is at a preselected position relative to the indicia, the suppressor is properly tightened with respect to the interface device.   
     
     
         2 . The interface device of  claim 1 , further comprising:
 the first end of the elongated body portion having a generally cylindrical exterior portion and at least one generally planar portion; and   wherein the indicia is located on the generally planar portion.   
     
     
         3 . The interface device of  claim 1 , further comprising:
 the first end of the elongated body portion having a generally cylindrical exterior portion and at least one generally planar portion; and   wherein the indicia is located on the generally cylindrical exterior portion.   
     
     
         4 . The interface device of  claim 1 , wherein the indicia indicates a range of acceptable preselected positions indicating the suppressor is at a preselected position and properly tightened with respect to the interface device. 
     
     
         5 . The interface device of  claim 1 , wherein the indicia includes:
 the word “go” expressly indicating a range of acceptable preselected positions wherein the suppressor is properly tightened with respect to the interface device; and   the words “no go” or the word “nogo” expressly indicating a range of unacceptable acceptable preselected positions indicating that the suppressor is not properly tightened with respect to the interface device.   
     
     
         6 . The interface device of  claim 1 , wherein the body portion is configured as a flash hider. 
     
     
         7 . The interface device of  claim 1 , wherein upon the rearward end of the suppressor being adjacent the indicia, the suppressor is properly tightened with respect to the interface device. 
     
     
         8 . The interface device of  claim 1 , wherein the indicia includes:
 at least one word expressly indicating a range of acceptable preselected positions wherein the suppressor is properly tightened with respect to the interface device; and   at least one word expressly indicating a range of unacceptable acceptable preselected positions indicating that the suppressor is not properly tightened with respect to the interface device.   
     
     
         9 . A firearm having a barrel with a muzzle, the firearm comprising:
 a threaded suppressor having a rearward end with a threaded portion;   an interface device attached to the firearm muzzle and configured for receiving the threaded suppressor;   the interface device including:
 an elongated body portion having a first end portion, a second end portion generally opposite the first end portion; 
 the elongated body portion defining a bore therethrough, and the bore defining a longitudinally extending central axis; 
 the first end of the elongated body portion defining an exterior surface; and 
 the exterior surface defining visible indicia indicating a preselected position; 
   whereby, upon the suppressor being threadingly engaged with the threaded engagement portion and rotated such that the suppressor is at a preselected position relative to the indicia, the suppressor is properly tightened with respect to the interface device.   
     
     
         10 . The firearm of  claim 9 , further comprising:
 the first end of the elongated body portion having a generally cylindrical exterior portion and at least one generally flat exterior portion; and   wherein the indicia is located on the generally flat exterior portion.   
     
     
         11 . The firearm of  claim 9 , further comprising:
 the first end of the elongated body portion having a generally cylindrical exterior portion and at least one generally flat exterior portion; and   wherein the indicia is located on the generally cylindrical exterior portion.   
     
     
         12 . The firearm of  claim 9 , wherein the indicia includes:
 the word “go” expressly indicating a range of acceptable preselected positions wherein the suppressor is properly tightened with respect to the interface device; and   the words “no go” or the word “nogo” indicia expressly indicating a range of unacceptable acceptable preselected positions indicating that the suppressor is not properly tightened with respect to the interface device.   
     
     
         13 . The firearm of  claim 9 , wherein the body portion is configured as a flash hider. 
     
     
         14 . The firearm of  claim 9 , wherein upon the rearward end of the suppressor being adjacent the indicia, the suppressor is properly tightened with respect to the interface device. 
     
     
         15 . A method of attaching a suppressor to the barrel of a firearm, the barrel including a muzzle defining a threaded portion, the method comprising:
 providing a suppressor having a rearward end with a threaded portion;   providing an interface device having an elongated body portion defining a bore therethrough and an exterior surface defining visible indicia indicating a preselected position;   attaching the interface device to the muzzle;   threadingly engaging the threaded portion of the suppressor with the engagement portion; and   rotating the suppressor relative to the interface device such that the suppressor arrives at a preselected position relative to the indicia, whereby the suppressor is properly tightened with respect to the interface device.   
     
     
         16 . The method of  claim 15 , further comprising the rearward end of the elongated body portion having a generally cylindrical exterior portion and at least one generally flat exterior portion; and wherein the indicia is located on the generally flat exterior portion. 
     
     
         17 . The method of  claim 15 , further comprising the rearward end of the elongated body portion having a generally cylindrical exterior portion and at least one generally flat exterior portion; and wherein the indicia is located on the generally cylindrical exterior portion. 
     
     
         18 . The method of  claim 15 , wherein the indicia includes the word “go” [or to that effect] expressly indicating a range of acceptable preselected positions wherein the suppressor is properly tightened with respect to the interface device; and the words “no go” or the word “nogo” indicia expressly indicating a range of unacceptable acceptable preselected positions indicating that the suppressor is not properly tightened with respect to the interface device. 
     
     
         19 . The method of  claim 15 , wherein the body portion is configured as a flash hider. 
     
     
         20 . The method of  claim 15 , wherein the step of rotating the suppressor relative to the interface device includes rotating the suppressor sufficiently for the rearward end of the suppressor to be adjacent the indicia.