LWRC/KAC question

that is a good question.

We have tested probably every other upper and lower combination for Knights SR25 receivers and barrel fit, but not LWRC. From our testing, LMT has been the only reliable fit. The Mega Maten and LaRue came close, but getting a fit to an SR25 lower, and having the lines match or having the upper receiver match a Knights barrel are a bit elusive.
 
Thanks, John. That's helpful. I'm not worried about matching receiver lines and such .... just function. I pulled the trigger on an LWRC REPR MKII Elite upper in 6.5cm, and I'll repost what I discover when I try mating it to my SR25 lower ....
 
It wont work.

In addition to the angle being wrong, the hole spacing is different.

I have physically tried to match lowers to Repr uppers with no luck.