Had another look at the beginning of this thread. Ah'm s'PRAHZD at all y'all.   Surely this song is in the digithingy. It came out when I was in high school (graduated in 1961) and was NOT the Beach Boys. I've never heard them do it. Can't remember the group, but not them. The way I remember it:

"Well, Ah'm a lawng, tall Texun--
Ah wayuh(wear) a 10-gallon hat.
(ref: He rides th'oo Texiss in a 10-gallon hat.)
(repeat these 3 lines once.)
Well, people look at me an' say,
'Er-uh, er-uh, izzat yo' hayut?'

Well, Ah'm a lawng, tall Texun--
Ah rahd(ride) a big, white hoss.
(ref: He rides th'oo Texiss on a big, white hoss.)
(rep. as above)
Well, people look at me an' say,
'Er-uh, er-uh, izzat yo' hoss?'

Well, Ah'm a lawng, tall Texun--
Ah enfoe-ss(enforce) justice fo' de law.
(ref: He rides fun(from) Texiss to enfoe-ss de law.)
(rep. as above)
Well, people look at me an' say,
'Er-uh, er-uh, iz yoo de law?'"

I've tried to give a pronunciation approximation as I remember the sounds. I don't remember a verse about a gun, but that doesn't mean there wasn't one. Just that I may be having a "senior moment". Sorry.    Tw