I sold an AR15 to someone that lives in Maryland on gunbroker. I will be sending it to a FFL dealer to handle the transfer. I read the restrictions on what can be sold in regards to AR's. The only thing I understood was the amount of rounds( 10 ) and the barrel can't have threads or a grenade launcher. Basically the barrel has to be a bull barrel I guess. I must admit it I find it difficult reading something a Lawyer wrote up. Am I missing anything?

HBAR only for an ar15........I think

Threads ok?

Yes.