Help!

[deerslayer357]

I need Help with buying a complete AR upper-
I already have a complete AR in 556.
Am looking to buy a 300 blackout upper to go on my existing lower.
I am planning to buy an aero precision complete upper- but it says it doesn’t include bcg or charging handle.

Can I use my bcg and charging handle from the already assembled 556 AR easily?

I am a newbie to building/swapping at parts.

Thanks

 

[Stevie Ray]

AR-15s are not my area of expertise but I don't believe you'll have any issues swapping out a single BCG and charging handle between the 5.56 and 300blk uppers, some may say you could have headspace issues and some may say you could wear parts faster but I believe most everybody will say it's no problem.

I don't know about swapping BCGs with differing gas length systems though?

 

[Jester896]

Yes, you can swap them...but I wouldn't. At the very least I would get a new bolt for your Bolt Carrier. I wouldn't worry about headspace issues, I'm sure when they chambered the gun it was generously chambered since they didn't have a bolt from the rifle to use. The reason I think this way is the bolts may cause different wear patterns with each of the barrel adapters. Keeping the same bolt with the barrel adapter makes it a non issue.

the carrier and the handle it wouldn't be an issue

 

[krizia829]

I would get a bcg dedicated to the new upper just so you have one on each but yes, you can use the 5.56 bcg on the 300 blackout.

 

[Railroader]

Just go on and get a complete upper from Bear Creek Arsenal...

 

[deerslayer357]

Ended up buying an upper from psa- still doesn’t come with charging handle or bcg, but don’t expect to switch back and forth frequently so I will use the bcg and charging handle I have. If I end up swapping back and forth more than I expect to I will buy a second bcg and charging handle.

Thanks guys!

 

[Jester896]

this is all you need..you can use the other parts from the other upper

https://palmettostatearmory.com/ar15-complete-mpi-bolt-assembly.html

 

[killerv]

You can but I wouldnt, chambers and bolts need to wear together. But if you dont shoot alot you wont have any issues. Just pickup a bcg and handle when funds allow.