Colt .38 Super Magazine Conversion
Conversion of Colt .38 Super magazines for use in Destroyer Carbines is
easily accomplished with a few hand tools available to most hobbyists.
Here's what you will need (or what I used)
The magazines are almost the same except for length and retaining cutout.
- set of calipers
- set of small files
- good hard point permanent marker with a fine point
- dremel type tool with cutoff wheels and steel cutting burr
- drill bits for steel or burrs for same
The first step is to determine the location of the magazine
retaining cutout on the Destroyer Magazine. I did this by inserting the
Colt magazine completely into the Destroyer's magazine well and marking
a line along the back of the magazine at the bottom of the magazine
well. I then measured the cutout in the Destroyer magazine for
dimensions from this line. I determined that the cutout needs to be
.050" above the marked line, .175" tall, .267" wide and centered in the
back of the magazine body. These dimensions will probably vary from
carbine to carbine though.
Next, I marked these dimensions on the back of the Colt magazine.
Before beginning work on the new hole, I pressed the magazine follower
all the way down in the magazine and retained it there with a nail
through one of the observation holes. This served to keep the spring
and follower out of the way of my drilling and filing. Using my Dremel
tool I made a hole in the center of this area using a metal burr bit
and widened it with the same bit until I could get a small round file
into the hole. After making this hole, I used a cutoff wheel to score
around the perimeter of the area to beremovedd and inside the area in a
cross hatch pattern. This removed some of the metal quickly and would
cut down on the time spent hand filing the hole. I started the filing
with a round file and finished with triangular and half round files to
clean up the corners and edges. I was left with a new retaining hole in
the Colt magazine.
ensuring that the spring and follower moved freely within the magazine
I loaded it up and inserted it in the Destroyer. It worked fine but was
hard to seat in the magazine well. A few more passes of a file on the
top edge of the opening and it seats and locks just fine. The top side
of the opening is the critical measurement on this project. If it is
too far up the magazine body, the magazine will not seat high enough in
the magazine well to feed properly. It is better to err on the side of
caution and work slowly by checking fit often.
now have a 'hi-cap' magazine for my Destroyer Carbine. Granted it's
only a nine round magazine and doesn't really qualify as 'hi-cap' but
it's bigger than the factory five round capacity.
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D. Castelli, All Rights Reserved.