In the Netflix film The Ballad of Buster Scruggs, there is a tune called When a Cowboy Trades his Spurs for Wings, which contains these lines:
When they wrap my body
In the thin linen sheet,
And they take my six ounce
Pull the boots from my feet...
What does “my six ounce” mean here? I’ve searched for the phrase on the Internet and asked an American friend who is a native speaker, but with no result. Is “my six ounce” an established phrase in English?