Ruger SR556 question

This may be a silly question but, is the Ruger SR556 lower compatible with other uppers?

Thinking Bushmaster 450 upper, specifically - but curious about any option?

 

Not a silly question at all. I'm also curious.

 

Yes. The one I had in 6.8 would swap.

 

What upper do you have in 6.8 WJ?

 

I've wondered the same thing myself.

Promised the wife no new guns for a while. An upper is not a whole gun.

 

The best source of info is with Ruger. Their's is a proprietary piston system so asking that on the Internet may get you the wrong answer.

 

It was another 6.8 upper, but a home build. Ruger's lower didn't fit or look any different than a normal AR design.

 

The upper is a whole 'nuther story. The lower follows standard dimensions. Ruger sells their uppers seperately to pin onto standard lowers too.

 

From Ruger:

I think that answers my question, although I asked specifically about the lower, Ruger seems to want to sell me an upper...

 

not to get off track, Id love to have a sr556.

 

Boosted - that's why I'm asking the question.I'd like to get the SR556 but I want an AR I can change the upper on to a 450 bushmaster, so that will be the deciding factor for me.

I was hoping some SR556 owners would chime in with their experiences...

 

Any SR556 owners out there with input?