this tool makes it so much easier to install the ABD part! and that was really needed. now do you only need this tool and a hobby knife to compress the spring.
the M3,M4 m5 stand for the Metric bolts you can use to compete the tool. and make sure to use a nice long bolt so it's more easy to get in the mag well.
here is a video of how to use this tool
The author marked this model as their own original creation. Imported from Thingiverse.