When it becomes necessary to handle your weapon after one hand/arm becomes disabled, the street is not the place to figure out how.
Try this technique when you only have one hand:
Hold the slide behind your knee, and kneel down. Your calf and thigh will secure the weapon while allowing access to the magazine well and release.
If it becomes necessary to cycle the slide (dud round or slide stop malfunction) hook the rear sights on the top of your duty belt just behind the holster, or on the heel of your boot. Then, push the gun forward as hard and fast as possible.
This may be more difficult with weapons like S&W because of the “ramp” on the front of the sight, but it is possible. If worse comes to worse, try to hook the edge of the ejection port.
Adair County, Mo.Deputy Sheriff Ray Jagger responded:
An easier way I have found to load with one hand is to put the gun back in the holster, release the magazine and slide in a new mag.
It is not recommended but with a glock and many others if the slide is locked back you can just take the gun out of the holster, point it in a safe direction and release the slide catch. Be sure to keep your fingers out of trigger guard.