Taking in a used Glock G21 / Polishing the Trigger Control Group

I replace the factory 5-1/2 LB connector with a 3-1/2 LB connector and polish the ignition parts.
Glocks are easy to completely disassemble since you don't need specialized tools. Replacement parts do not require fitting by a gunsmith, however if you don't reassemble your Glock properly it may malfunction when you need it.
If you are unsure about the process take your Glock to a Glock armorer.

I'm not a professional gunsmith, work on your firearms at your own risk. This video is for entertainment purposes only.