AMT Automag II Safety Replacement
As with the firing pin replacement, I was unable to locate video or photos of the safety replacement on the Automag II. There are a number of references which advise against taking apart the safety, but my safety was not working properly- so I had to go there
I'll put the warnings first, because it is almost certain you will be faced with the same challenges.
WARNING: The detent (small ball bearing) is very small. If (when) you lose control of it, it will be very difficult to find. I recommend using some grease to inhibit the movement of the detent during reassembly.
WARNING: The detent springs I received from Brownells were much longer than the original spring. It is unlikely these long springs can be compressed and also press the detent into the hole to receive the safety. Additionally, the added pressure of the longer spring may place too much pressure on the detent, making the safety difficult to operate.
WARNING: If the detent spring protrudes out of the hole, it is very difficult to remove the safety without damaging the spring. I recommend trimming long springs so they do not protrude out of the detent spring/detent hole.
1. Using a flat tip screwdriver if necessary between the slide frame and the safety, pry out the safety away from the frame. It may be possible to remove the safety by hand if the safety is rotated half way between safe and fire. Using care to retain the detent, pull out the safety.
2. Remove the safety detent spring and inspect both the spring and detent if they are going to be reused.
3. Before attempting to reinstall the new safety, check the fit without the spring and detent. If necessary, buff and polish the new safety so it moves freely. The tolerance on the safety is very tight, so it will be easy to feel any burrs.
4. Reassembly requires the spring and detent to be pressed into the hole. The safety hole is too small for a finger. I was successful using a hex key from the inside of the slide to press the spring and detent down far enough to slide in the safety. NOTE: The safety has a very narrow shoulder about half way between safe and fire which should be used to ride the detent along as the safety is pushed fully into the safety hole. If the safety is not aligned this way, the detent will pop out of the hole and the process will need to be repeated until the detent remains fully seated.
5. Test the safety. If the detent is properly installed, the detent will fall into one of the round cutouts on the safety- which provides a light lock on safe or fire. If there is no "click" as the ball falls into the cutout on the safety, the detent is not properly engaging.
DONGUIDOII