I use the Luth AR MBA-1 on a Stag Model 6 Super Varminter.
Before I got the second Stag 6, My Granddaughter and I shared the original Stag, but I'm 6' 5"+ and she's 5' 3", and consequently the A2 Stock was just not cutting it for the two of us.
So I got the MBA-1 and it was purely night and day. The Cheek weld adjustment was overkill, even cranked all the way down, it was too high; so it was removed and stowed away safely.
Understand that even on full LOP extension, my height made for a small issue, so I simply pushed on a Limbsaver 1" Slip-on, and Voila; perfect fit. My inside the Elbow to Trigger Finger LOP runs about 16 1/2".
I get to keep the Luth AR on my Stag 6 Kit, she has the A2 stock reinstalled on our original Stag 6. We're both happy with the arrangement.
Now I'm looking at their Chubby grip, and will probably be replacing an economy handguard on a homebuilt 16" Upper with one of theirs.
Good stuff.
Greg