There's been some crummy tabs for this song so far so i took the liberty of making 
a correct version.  Thanks please rate ! Also all the chords come up correctly 
except C#5.  i listed all the correct ways to play the chords for this song below. 
very easy and simple, and my first tab! enjoy! 

Chords-  E- 022100  A5- x02200 B5- x24400 C#5- x46600 

Capo 2 

     E                           A5 
It sits above the mantle, on a couple rusty nails, 
          E                          A5
It aint worth a lot of money, and it damn sure aint for sale 
      B5                           A5
The good lord only knows all the stories it could tell, 
               E
Granddaddy's gun 
    E                                  A5
He bought it new out of the sears and robuck catalog
        E                           A5
And it shot a many shells over the back of an old bird dog
        B5                                  A5
And it backed a burglar down when grandma took the safety off
                E 
Granddaddy's gun.

Chorus
       A5                E
It's just an old double barrel twelve
      B5                     C#5
The stock is cracked and it kicks like hell
     A5                    E            B5
It wouldn't mean what it means to me to no one
              A5                         E
Cause I can still hear his voice when I put it to my shoulder
   B5                         C#5
A guns like a woman son it's all how you hold her
     A5                   E                B5
He taught me a whole lot more than how to hunt
      A5                     E                 B5
And one of these days I'll pass it on to my grandson 
                    E    A 
My Granddaddy's Gun


          E                        A5
That old man gave it to me on the day I turned thirteen
         E                            A5
With a half shot box of shells and a kit to keep it clean
    B5                                A5
I keep a picture in the case of that sweet old man and me
                   E
And Granddaddy's gun


Chorus
       A5                E
It's just an old double barrel twelve
      B5                     C#5
The stock is cracked and it kicks like hell
     A5                    E            B5
It wouldn't mean what it means to me to no one
              A5                         E
Cause I can still hear his voice when I put it to my shoulder
   B5                         C#5
A guns like a woman son it's all how you hold her
     A5                   E                B5
He taught me a whole lot more than how to hunt
      A5                     E                 B5
And one of these days I'll pass it on to my grandson 
                    E    A 
My Granddaddy's Gun

solo 
            A5                        E
There's a long beard hanging on the livin' room wall
        B5           C#5         A5          E B5
That I got with a box call and Granddaddy's gun
           A5                     E
There's a shot up sign out there on forty nine
      B5                    C#5 
That me and billy joe shot up one night
    A5            E  B5
With granddaddy's gun 

     E                          A5
It sets above the mantel on a couple rusty nails
          E                           A5
It aint worth a lot of money and it damn sure ain't for sale