What upper will fit on a Rock River lower?

[tjtorborg]

Hey guys,

I recently got a deal on a complete Rock River lower.  Do I have to stick with Rock River or can I use someone else's upper?  Any and all advice is more than welcome.

Thanks,

Tom

[98Z5V]

Only a Rock River, unless someone in the aftermarket started putting them out.  I haven't seen an aftermarket upper receiver for one of these yet, but it might be out there.  <dontknow>

[Bryan Hoover]

Any new information on this? I just acquired a RRA complete lower and don’t care for the uppers they offer? What if any parts are interchangeable with other manufacturers? 

[edgecrusher]

None, no, negative, nyet, nein. It’s proprietary. 

[Bryan Hoover]

Thanks 

[sketch]

this is my RRA lower with an areo (dpms) upper... no worky!

[Sisco]

19 minutes ago, sketch said:

this is my RRA lower with an areo (dpms) upper... no worky!

Its designed that way to allow the buffer to “breathe”

[sketch]

I guess i should a lined up the trigger to the bolt.. it might fire?? add some duct tape who knows? ?