10.5 or 12.5, which one? Also engraving question.
I am getting ready to fill out the form 1 for my SBR project. I have narrowed it down to the 10.5 or 12.5 Noveske upper. I would like to get the shortest possible upper so that my suppressor will not make it very long once attached. However, I will not be using the suppressor all of the time so that is not the overall deciding factor here. I just want to get the best results out of this short weapon even though the 5.56 is not very good out of short barrels.
Will I be losing much velocity going from the 12.5 to the 10.5 upper as this will not be used for anything passed 100 yards anyway. Any help you could give me would be great. I tried to search but sometimes this gets confusing...
I was also wondering if the actual caliber of the gun has to be engraved on the lower if the original manufactorer (Noveske) did not have it on there to begin with? Is this mandatory or what? Thanks