Tag Archives: ultra-x

3D Printing a Magazine Sleeve

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As you’ll recall from my review of the BUL Impact, I loved the pistol, but bemoaned the lack of a way to get a nice flush fit with the full length BUL M5 9mm magazines. There was a product image showing a sleeve adapter, but I had never seen one in the wild.

Well, if you can’t buy it… you build it. Or in my case, you 3D print it.

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The BUL M-5 Ultra-X

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One of my “grail guns” has always been the BUL M-5 Ultra-X, dating from my first year of getting into firearms. I’ve always loved its combination of compactness and firepower. For a long time, I had been holding out hope of getting one in 9mm, but it became clear through my research that if any Ultra-Xs in 9mm were ever imported, it was probably vanishingly few. I settled on a Charles Daly .45ACP model that a reader offered at a good price.

My thoughts? Read on!

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The difference between BUL Impact and BUL M-5 Ultra magazines

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One mystery that consistently driven me a bit crazy is the subject of whether BUL M-5 Ultra magazines are compatible with the BUL Impact, and vica versa. I finally have an answer. As you can see in the above picture, the difference between the two magazines is the follower. The Impact magazines (seen on the right) have a slightly different follower with a higher left hand side to push up the Impact’s slide stop. The M-5 magazines (on the left) have a “normal” profile follower without the raised edge. You can use either magazine type in either gun, but the M-5 magazines won’t actuate the slide stop on the Impact, and the Impact magazines will require more force to release the M-5’s slide on an empty magazine.

Given that proper Ultra-X magazines appear to be going for astronomical ($100+) prices these days, being able to use DDA mags should be very financially helpful to owners of the Charles Daly M-5 Ultra-X and the Kimber Ten II Ultra.