Warning

 

Close

Confirm Action

Are you sure you wish to do this?

Confirm Cancel

Log In

A valid email is required.
Password is required.
Site Notices
Basic
Offline
  • Joined May 2011
  • Posts 32
  • EE 100% (16)
USA KY, USA
Posted: 10/31/2011 3:21:19 PM EST
I have a quick question. For my build im using a Multi-caliber lower receiver. From my understanding i can use pretty much 5.56, 223,6.5 creedmoor, 6.8 spc, 5.7, 243, 5.56x54 uppers. Am i correct on this statement?


Thanks in advance
Shayne

2 Round Burst
Avatar
Bronze
Offline
  • Joined Oct 2006
  • Posts 5681
  • EE 100% (65)
USA NH, USA
Military
Link Posted: 10/31/2011 3:38:35 PM EST
Yes, but not because it's engraved "multi".

You can run whatever AR upper (regardless of caliber) on any AR lower (regardless of markings)
Please, call me Joe

There is definitely something perverse about two men who carry guns 24/7 being so happy that others are giving theirs up. -happycynic
Basic
Offline
  • Joined Sep 2011
  • Posts 6
  • EE 0% (0)
USA NC, USA
Link Posted: 10/31/2011 3:52:46 PM EST
Originally Posted By szairborne:
I have a quick question. For my build im using a Multi-caliber lower receiver. From my understanding i can use pretty much 5.56, 223,6.5 creedmoor, 6.8 spc, 5.7, 243, 5.56x54 uppers. Am i correct on this statement?


Thanks in advance
Shayne


If I'm not mistaken, you CANNOT use 6.5 creedmoor in an AR-15 lower. I think that requires an AR-10 lower, but I could be wrong. You might have meant 6.5 Grendel in which case you would be good to go for any of the calibers you mentioned.

Basic
Offline
  • Joined May 2011
  • Posts 33
  • EE 100% (16)
USA KY, USA
Link Posted: 10/31/2011 3:57:40 PM EST
Thanks guys!

Basic
Offline
  • Joined Oct 2011
  • Posts 45
  • EE 100% (6)
USA TX, USA
Link Posted: 10/31/2011 4:00:32 PM EST
[Last Edit: 10/31/2011 4:03:13 PM EST by thepinkmist]
Originally Posted By TCBA_Joe:
Yes, but not because it's engraved "multi".

You can run whatever AR upper (regardless of caliber) on any AR lower (regardless of markings)


+1. the caliber engraving does not lock a lower reciever into a certain caliber. most AR lowers now come with multi for the caliber because variants are becomming more and more popular so the manufacturers decided putting multi would be a little more appropriate. you can use google or look in the AR variant forum and find all the other 92 cartridges that can be fired from a standard ar15 lower.


243 will not work in an ar15 upper IIRC, it needs an AR10 lower.

San Jose, CA
Avatar
Bronze
Offline
  • Joined Nov 2000
  • Posts 3601
  • EE 100% (2)
USA CA, USA
Link Posted: 10/31/2011 4:02:51 PM EST
There are many other caliber uppers besides what you have mentioned that can be fitted to an AR-15 style (short action) lower.
1st Cav Div, B 5/7
Vietnam/Cambodia
1970
Basic
Offline
  • Joined May 2011
  • Posts 34
  • EE 100% (16)
USA KY, USA
Link Posted: 11/1/2011 2:28:53 AM EST
This is good information, thanks for the clarification on the 243. Im trying to get a setup that is fun for me, but also for my two daughters who also love to shoot.

Thanks
Shayne

Top