In this video I cover the method I use to open shotgun loading ports. This is not an end-all be-all One True Way, just how I do it. There are other great videos out there I would also recommend you watch, chiefly Jesse Tischauser's video series on the same subject:
https://www.youtube.com/watch?v=KpwIe8FnPaI
https://www.youtube.com/watch?v=fZD_SQikO7o
https://www.youtube.com/watch?v=eV6zbComd4I
The tools I used are:
- Brightly colored vinyl tape & 2" painters tape.
- Variable speed Dremel or equivalent die grinder
- 1/8" double cut carbide burr
- Dremel sanding drums, fine grit
- Dremel EZ Lock mandrel and finishing abrasive buffs in 180, 280 and 320 grit
- Dremel buffing wheel and white rouge, green stainless and blue all-purpose buffing compounds.
- Vise with padded jaws.
Check out my video comparing the Franchi Affinity to the M2:
https://www.youtube.com/watch?v=U3w0auqskDI
My video on how to disassemble the trigger group:
https://www.youtube.com/watch?v=Z2sLNncEIvk
This video also applies to pretty much any shotgun used for 3-gun or multi-gun, Stoeger M2000, M3000, M3K, Mossberg 930, Beretta 1301, FN SLP, Benelli M1 Super 90 M2, Remington Versamax.