Rail arrangement for firearm

Abstract

A rail arrangement, which is adapted for mounting one or more accessories on a frame portion of a firearm, includes a supporting frame for attaching to the frame portion of the firearm along a longitudinal axis thereof and a rail system. The supporting frame includes a top mounting rail arranged for longitudinally extending on the frame portion, and two angled mounting rails inclinedly and sidewardly extended from the top mounting rail. The rail system includes one or more mounting structures providing of the top mounting rail and two angled mounting rails of the supporting frame for detachably mounting the accessory at one of the top mounting rail and the angled mounting rails of the supporting frame so as to selectively adjust a position of the accessory with respect to the firearm.

1 . A rail arrangement for mounting one or more accessories on a frame portion of a firearm, comprising:
 a supporting frame, which is adapted for attaching to said frame portion of said firearm along a longitudinal axis thereof, having a top mounting side, a bottom mounting side, and two angled mounting sides, and comprising a top mounting rail provided on said top mounting side for longitudinally extending on said frame portion of said firearm, a bottom mounting rail provided on said bottom mounting side, and two or more angled mounting rails which are provided at said two angled mounting sides and are inclinedly and sidewardly extended from said top mounting rail; and   a rail system comprising one or more mounting structures providing of said top mounting rail, said bottom rail, and said angled mounting rails of said supporting frame for detachably mounting said accessory at one of said top mounting rail and said angled mounting rails of said supporting frame so as to selectively adjust a position of said accessory with respect to said firearm.   
   
   
       2 . The rail arrangement, as recited in  claim 1 , wherein each of said angled mounting sides contains an upper slanted mounting side longitudinally extended from said top mounting side and a lower slanted mounting side longitudinally extended between said upper slanted mounting side and said bottom mounting side. 
   
   
       3 . The rail arrangement, as recited in  claim 2 , wherein each of said upper slanted mounting sides is downwardly and sidewardly extended from said top mounting side at 120°. 
   
   
       4 . The rail arrangement, as recited in  claim 2 , wherein each of said lower slanted mounting sides is upwardly and sidewardly extended from said bottom mounting side at 120°. 
   
   
       5 . The rail arrangement, as recited in  claim 3 , wherein each of said lower slanted mounting sides is upwardly and sidewardly extended from said bottom mounting side at 120°. 
   
   
       6 . The rail arrangement, as recited in  claim 1 , wherein said supporting frame further comprises an upper bracket defining said top mounting side thereat and a lower bracket defining said bottom mounting side thereat, wherein said upper bracket is detachably affixing to said lower bracket form a handguard having a tubular cavity for encircling said frame portion of said firearm, and defining said two angled mounting sides. 
   
   
       7 . The rail arrangement, as recited in  claim 2 , wherein said supporting frame further comprises an upper bracket defining said top mounting side thereat and a lower bracket defining said bottom mounting side thereat, wherein said upper bracket is detachably affixing to said lower bracket form a handguard having a tubular cavity for encircling said frame portion of said firearm, and defining said two angled mounting sides. 
   
   
       8 . The rail arrangement, as recited in  claim 5 , wherein said supporting frame further comprises an upper bracket defining said top mounting side thereat and a lower bracket defining said bottom mounting side thereat, wherein said upper bracket is detachably affixing to said lower bracket form a handguard having a tubular cavity for encircling said frame portion of said firearm, and defining said two angled mounting sides. 
   
   
       9 . The rail arrangement, as recited in  claim 7 , wherein said two upper slanted mounting sides are longitudinally formed at said upper bracket and said two lower slanted mounting sides are longitudinally formed at said lower bracket. 
   
   
       10 . The rail arrangement, as recited in  claim 8 , wherein said two upper slanted mounting sides are longitudinally formed at said upper bracket and said two lower slanted mounting sides are longitudinally formed at said lower bracket. 
   
   
       11 . The rail arrangement, as recited in  claim 6 , wherein said supporting frame has a hexagonal cross section when said upper bracket is affixed to said lower bracket. 
   
   
       12 . The rail arrangement, as recited in  claim 8 , wherein said supporting frame has a hexagonal cross section when said upper bracket is affixed to said lower bracket. 
   
   
       13 . The rail arrangement, as recited in  claim 10 , wherein said supporting frame has a hexagonal cross section when said upper bracket is affixed to said lower bracket. 
   
   
       14 . The rail arrangement, as recited in  claim 2 , wherein said mounting structure comprises a plurality of rail flanges spacedly and integrally provided on said top mounting rail, said angled mounting rails, said bottom mounting rail, and said lower angled mounting rails for detachably engaging with said accessory thereat. 
   
   
       15 . The rail arrangement, as recited in  claim 13 , wherein said mounting structure comprises a plurality of rail flanges spacedly and integrally provided on said top mounting rail, said angled mounting rails, said bottom mounting rail, and said lower angled mounting rails for detachably engaging with said accessory thereat. 
   
   
       16 . A firearm, comprising:
 a firing assembly having a frame portion and defining a longitudinal axis thereat; and   a rail arrangement, which is adapted for mounting one or more accessories on said frame portion of said firing assembly, comprising:   a supporting frame, which is attached to said frame portion of said firing assembly along said longitudinal axis, having a top mounting side, a bottom mounting side, and two angled mounting sides, and comprising a top mounting rail provided on said top mounting side for longitudinally extending on said frame portion of said firearm, a bottom mounting rail provided on said bottom mounting side, and two or more angled mounting rails which are provided at said two angled mounting sides and are inclinedly and sidewardly extended from said top mounting rail; and   a rail system comprising one or more mounting structures providing of said top mounting rail, said bottom rail, and said angled mounting rails of said supporting frame for detachably mounting said accessory at one of said top mounting rail and said angled mounting rails of said supporting frame so as to selectively adjust a position of said accessory with respect to said firearm.   
   
   
       17 . The firearm, as recited in  claim 16 , wherein each of said angled mounting sides contains an upper slanted mounting side longitudinally extended from said top mounting side and a lower slanted mounting side longitudinally extended between said upper slanted mounting side and said bottom mounting side. 
   
   
       18 . The firearm, as recited in  claim 17 , wherein each of said upper slanted mounting sides is downwardly and sidewardly extended from said top mounting side at 120°, wherein each of said lower slanted mounting sides is upwardly and sidewardly extended from said bottom mounting side at 120°. 
   
   
       19 . The firearm, as recited in  claim 18 , wherein said supporting frame further comprises an upper bracket defining said top mounting side thereat and a lower bracket defining said bottom mounting side thereat, wherein said upper bracket is detachably affixing to said lower bracket form a handguard having a tubular cavity for encircling said frame portion of said firearm, and defining said two angled mounting sides, wherein said two upper slanted mounting sides are longitudinally formed at said upper bracket and said two lower slanted mounting sides are longitudinally formed at said lower bracket. 
   
   
       20 . The firearm, as recited in  claim 19 , wherein said mounting structure comprises a plurality of rail flanges spacedly and integrally provided on said top mounting rail, said angled mounting rails, said bottom mounting rail, and said lower angled mounting rails for detachably engaging with said accessory thereat.