I really wanted to swap out the flat base plate with an extended one, but I could not find any for sale anywhere. I emailed Remington Customer Service and did not the courtesy of a reply. The Companies sales are way off in 2017 and I bet poor CS helped that along.

Anyway, after exhausting all search efforts I decided to innovate. I bought a magazine on eBay for $22 which included shipping. It came with the flat and extended base plates. I kept the flat one and swapped it out on my flat base magazine.

Then I sold the new magazine with the flat base only on eBay for $18 plus postage. So my cost for the extension was $4. I was ready to pay more tha that for the extension if I could have found one.

So I have a flat baseplate if anyone prefers them. No charge. Just PM me with an address and I will send it to you. Based upon the activity here (what a shame) do not expect to get much interest to keep things fair: First come first served.

Good story!

I found that Pearce extensions for Kahr 9mm fit nicely on the RM380. I’ll post a picture when I can.


Dave

Thanks for the tip.

Here's a picture with the Kahr CM9 Pearce extension. I've sanded some off the extension so that I get about 2/3 of my pinky on the grip but obviously you don't have to do that. There is a larger space between the front of the extension and the bottom of the mag well than with the stock extension but it isn't noticeable and there is no pinching whatsoever when firing.

Thank David. Did you but the extension or a mag with that extension on it?

I bought a 2 pack of the Pearce extension on eBay for my CM9 and tried them on an RM380 magazine.


Dave

Thanks again David. That is very helpful information.

Thumbs up!! Good to know.

I also found that the Adams Grip Extension that's made for the Diamondback DB9 will work on the RM380.

The extension slides onto the magazine and locks in place with no problem. I had to sand a little material off the top of the extension so that the magazine will lock into the firearm. I chose to also sand a little off the bottom of the extension as I don't need it to be as large as it is. It's a little pricey, $21 for a magazine extension that does not add any capacity but it really changes how the firearm feels in my hand, for the better. I can still conceal it with no issues. I test fired 35 rounds with it and no issues.