Meaning of rifle is fine | Babel Free

Definitions

1. Expresses the belief that something, particularly a firearm, is sufficient for its given purpose, and that any suggested improvements would be unnecessary or a detriment.
   Internet, humorous
2. Used to mock the belief that something, particularly a firearm, is sufficient, when it is perceived by the speaker to be obviously obsolete or ineffective in the face of better alternatives offered.
   Internet, humorous, sarcastic

Examples

“You don't want a new handguard for that? ― Of course not. Rifle is fine.”

CEFR level