To help with this, I have created a level that can be used to earn the achievement if you do not have the downloadable content. The paintball gun will be available to use in the level. If you just tap R1 as quickly as possible you should pick this one up.
If you search the community levels for me as an author, wilberforce072, you will see a level called TT trophy level.
It will also help you earn a number of other trophies.
Let me know if you have any trouble with it.