04-03-2011, 06:07 PM
Here in the Communist Republic of Kaliforgnia it doesn't matter what the lower receiver has stamped as a caliber. One can attached any caliber upper receiver one likes as long as you don't mess with the lower receiver serial number which is a big no-no any in any State you live.
In other words, if one of the least gun friendly States in the Union doesn't care about the caliber stamped in the lower receiver, you shouold be OK attaching what ever kind of upper you like.
In other words, if one of the least gun friendly States in the Union doesn't care about the caliber stamped in the lower receiver, you shouold be OK attaching what ever kind of upper you like.