I think they call it Sendero, my Proof Sendero barrels fit nicely. Not sure if M24 is just a bit bigger. Sendero is bigger than most varmint.
@300 Driver I have switched to Stockys VG models for almost everything. Their carbon series isn't maybe as pretty and expensive as Manners, but their bedding block works, haven't felt the need to bed one yet, but I will eventually just because. Had a swivel stud pull out once, but going to QD cups solved that.
I have used and eventually sold my all my McMillan and AG composites.