2 Chainz Look Ma, No Brass Knuckles!!!

0525_2_chains_airport_jewelryFlashing his brass knuckle-free hands, rapper 2 Chainz was spotted at the airport in D.C. on Friday ... without incident.

As TMZ first reported, 2 Chainz was arrested for misdemeanor criminal possession at LaGuardia Airport in NYC on Tuesday after security discovered a four finger metallic ring in his carry-on bag ... and deemed it a weapon.

The "Spend It" singer is known for wearing the controversial bling -- which says "DOPE" across the front -- but he's apparently figured out it's best not to flaunt it in front of TSA.