Quoted:
2. Being that this lower is stamped 5.56mm will it be more accurate with military surplus, or commercail .223? (I cannot find any markings on the barrel to confirm 5.56mm)

Sorry for the noob questions. I am just trying to sanity check what info I have already found.
:)

Thanks in advance! I'll post a detailed range report later today.

Quoted:
Hey all! First of all great site! I have learned quite a bit here! Outstanding job!

I just bought my first AR15. It was on consignment at a local gun shop, it is a Rock River Arms Standard A2 20". It is stamped 5.56mm LAR-15. The upper and barrel have no markings but the ticket on the rifle notes that it is a FN Upper?

Question:
1. What is an FN Upper? Is this the standard for RRA complete rifles or do you think this rifle was built with different uppers/lowers?(super noobie question I know)

[red]Some companies say their parts are FN because they are made by the same contractors that sell to FN. FN is forbidden from selling to anyone but the government due its contract with them. Since the tag stated that it was an FN upper on a RRA lower I would guess that it was built by someone other then RRA.[/red]

2. Being that this lower is stamped 5.56mm will it be more accurate with military surplus, or commercail .223? (I cannot find any markings on the barrel to confirm 5.56mm)

[red]The marking on the lower has nothing to do with the chambering of the barrel. The barrel you have is probably a 5.56 but you may have to do some more research to find out for sure.[/red]

Sorry for the noob questions. I am just trying to sanity check what info I have already found.
:)


Thanks in advance! I'll post a detailed range report later today.

Quoted:
OH SHIT! You've contracted the "Black Rifle Disease"!

Welcome to the Club, It's a down hill ride from here.

Planning #2 AR yet, carbine?

Danny

Quoted:
Thanks for the warm welcomes! [:D]

Minuteman419: hehe, yup already pricing out a carbine upper. [heavy]