How many barrels does a drilling gun have?

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Tags

1. #consisting
2. #rifled
3. #barrels
4. #detachable
5. #stock
6. #notable
7. #drilling
8. #cosmonaut
9. #short
10. #survival
11. #smoothbore
12. #gauge
13. #barrel
14. #shoulder
15. #pistol
16. #barreled
17. #unusual