Auto-blocking belay devices are highly recommended among avid climbers, but it's hard to belay those devices with the miniature locking carabiners that appeal to alpinists. Camp USA designed its miniaturized Orbit Locking Carabiner with a rounder basket to accommodate auto-blocking belay devices. Another recent update, the SphereLock nose minimizes play between the nose and screw gate, and its slimmer keylock nose eliminates snagging when you use the Orbit with an anchor.
Small locking carabiner reshaped for auto-blocking belay devices
SphereLock minimizes play from nose and screw gate