PSA and markings on the BBL. ?

[Old Corps 8541]

I picked up an AR with PSA marking on the lower , but the only markings on the 20" (+-) BBl. are 5.56 NATO 1-7. Does anyone know if there are any other markings on the BBL. I thought about swapping the Bbl. But my club is having a swap meet and it may be the best way to do some house cleaning.


Thank you

V/r

 

[bfoosh006]

Please post a photo of the barrels markings... someone might recognize it.