YVK won a Macro lower/XL upper at a match last summer, and despite my pestering him as to how good the Macro shoots, he still hasn't shot it. Today, he was shooting a drill with his 365, and then repeated it using a 17 round mag, and was 20 percent faster his first try. I teased him that maybe this Macro lower idea wasn't so stupid. He has a 3.1 inch upper with a PMM barrel and comp, and I suggested he drop that right on the Macro lower.
I put my PMM upper on my Macro lower, and shot some drills for YVK at the end of my practice session. This combo is the best shooting Macro combo I have tried. Here is a short video with:
1) two hits to three steel at 10 yards
2) two hits to each paper A zone at 10 yards
3) two body, one head at 7 yards
4) a five shot freestyle group with Gold Dot 124+P at 20 yards
https://youtu.be/0DmMMwHW5v0?feature=shared