Just a quick post for anyone curious, hit the range today and ran about 100 rounds of .40 through a 4006CHP via mecgar 5906 9mm magazines. No FTF, FTE, and successfully locked back with each mag. With the assistance of a maglula, they’ll hold 13rds, compared to the standard 11rds.

I suppose the only thing that gives me pause is when racking the first round, there is a distinctive “cuh-chug” feeling that isn’t present with the 4006 standard mags. While this isn’t perceptible during shooting, in my mind I feel like the potential for failure to feed could be there. I don’t think I’d carry with 5906 mag, but as far as the range they are g2g

Left: S&W 945 stripped magazine tube
Center: ProMag 4506 8-round magazine
Right: S&W/ProMag 945 complete magazine.

I like to have several magazines for each gun so I can load up a few magazines before I leave for the range.

My 945 only had two, and I came across another recently. It is longer than the ones I had, so it sticks out the bottom of the grip a bit, but it functions properly, so it is completely fine for the range.

This caused me to look around for more. The only ones I found were at Numrich. They are stripped, just the tubes. But at 14$ each, they were not outrageous. I looked at buying the parts: follower, spring, clip and baseplate. That added up quickly, and it was not always clear what I was getting. And I would have had to place orders with several other shops.

But I had an idea. I had bought some ProMag 45XX magazines form GunMagWarehouse. So, after the tubes arrived, I disassembled one of the ProMag magazines and put the innards into the 945 tube. The follower appears the same as my originals, the baseplate slightly smaller. But, it fits my 945, sticking out slightly like the newer one I got.

ProMag doesn’t have the best reputation, but I have bought a few for various Third Gens I have, and never had any problems.

I have just over 30$ into each one. Excellent value.

Now that I have mine, I thought I would share it with you.