Trying my new Rock River Lower on Uppers.

My wife asked what are you doing? I said having fun.

Just like a puzzle; except most every piece fits!!!!!!!!!

Yep. Looks like fun to me. Kind of like a kid in a candy store.

Fun? That should be a daily occurence!

Sir, If you don't mind me asking, what are the different brand uppers and did they all fit with no problems? I have read of some match ups not working as they should so I just wanted to see if you would share your combos and how they fit.

Does it fit all of your uppers? I bought a Rock River lower about 2 yrs ago and it would not fit ANY of my uppers: Bushmaster, Rock River, nor DPMS. Sold it to one of the eternal dealers at the Jackson gun show for exactly what I paid for it, so no loss.

The only one that it had a problem on is the vulcan upper I got this week. It fit but the pins were very hard to get in and out. A sabre defense, double star in 6.8, alexander arms in 6.5, a dpms 223 and the upper that is on the custom bbl not sure who made the upper.
It does not go on and off as easy as my Sabre lower. That is the ar I have had for years and I think the best ever made. JMO

I bought a Rock River lower last weekend at the gunshow both of my uppers a Blackthorne 5.56 and a CMMG .22 fit it fine.