Mounting Holster in car

[LAYGO]

This is how I have mine set up. I used a standard pancake holster that accomidates my autos and revolvers. I drilled the trim piece on the front of my seat, and used rivets to attach the holster. It puts the weapon in the perfect defensive position for a car jacking. Hope the pictures help.

Which M&P is that? I've got the 45c & love it.

Thats the M&P compact .40, I also have the full size .40. Both are great pistols.

My next is a FS .40 & then a barrel conversion to 9mm.

You can covert a FS .40 to a SIG .357 with just a barrel conversion, but the 9 conversion takes a few more parts and some luck...

According to several users on smith-wessonforum.com, it's only taking a barrel/mag change. There are multiple users doing it.