The risers are machined so those who prefer a rest using the Martin Lock Mount can do so. It does make for a more aesthetic appearance and a more secure mount, but I've never had a rest move on many years. If you check out the Martin on-line store you'll find you can buy a Whisker Bisquit with the Martin Lock Mount as an integral part. I've got one that I tried for a while and can say there is no advantage if you know how to mount a rest and tighten it down.
Originally Posted by BENGAL ARCHER
If You're Not Living on the Edge You're Taking Up Too Much Space
Martin/Rytera Staff Shooter
PSAA Life member, UBP Life member
PADI AOW Diver