THE ORIGINAL AR-10 WAFFLE MAGAZINE
The SR-25 (and later, the DPMS) is developed from the original AR-10. As for the later AR-15, the magazine of the original AR-10 is lightly built from aluminum and is supposed to be disposable. It’s often called a “waffle” magazine because of the rib pattern on its aluminum body. Unlike modern AR magazines, the waffle magazine uses a metal follower.
Although the waffle magazine would fit into a modern AR-10, it wouldn’t work. Its magazine catch hole, the follower bolt hold-open slot and the feed lips are all different and will not work on modern AR-10s without some modifications.
On the left is the original AR-10’s aluminum lightweight waffle magazine. Next to it is the farmore-robust steel M-14 magazine.