Thank You!
Thanks!
In Service Rifle the 20-round mag does not get in the way of the sling, but I built a no-more-excuses Match Rifle and in prone, the match sling and the 20 round mag argue over space. Maybe it is the adjustable handstop, I don't know.
Anyway it sure looks like 10-round mags will alleviate the problem. As far as I can tell the 10s and 5s are the same external size - in MR they load 5 & 5 instead of 2 & 8 for sitting and prone rapid.
Thanks again, I'll get the 10-round magazines.