Fitting a Csspecs Steel Magazine To A SDS Lynx 12ga Shotgun

Csspecs makes wicked steel magazines for a variety of niche weapons. They make a well respected magazine for 12 gauge Saiga shotguns. That meant it would fit my SDS Lynx 12ga also.

I placed my order on their website and within a week receive to magazines that were built like a tank. I had a problem with some of the plastic SDS 10 round magazines in terms of the follower going all the way to the top. The Csspecs follower shot up in the top so fast I think you could take off a body part 🙂 just kidding but it is very well done.

You have to love a magazine that is so heavily made it can be used as a defensive weapon all by itself 🙂  Seriously, Csspecs makes some wicked mags and they tell you right up front that you may need to do a bit of fitting and I did.

Fitting The Magazines

The magazines come with a small instruction pamphlet for fitting that makes perfect sense to anybody who’s ever had to fit AK magazines. Step one is to make sure that the magazine fits correctly from front to back. If it does not you trim a little bit off the back tab of the magazine.

In my case it set right in. You can see how the mag stops are coming right against the bottom of the receiver.  This is good!  If I did need to trim it, I would have carefully filed a bit and tested over and over until the mag stops contacted the receiver, polished the surface and applied cold blue per the details in the next step.

In my case, the magazine locking lever would not engage the mag’s tab at all. That means that little tab was too thick and needed to be filed down. This is really a situation where you want to use a fine hand file and take off a little bit at a time and test – don’t rush this. Take care to maintain the slight angle. This helps with the lock up.  Do not make it flat and try to keep it as straight across as possible.

I can’t stress enough, take your time.  The above was done with a single-cut file where one edge was ground down so I can make cuts like this with out damaging the surface.  You can sometimes buy files like I show below with one or both edges left plain.  In my case, I used my belt sander to remove the teeth on that side.

This is not a situation where you want to rush. Take a little bit off at an angle and test over and over. It probably took me about 5 minutes per magazine. You want the magazine to lock into place firmly. If it is really loose I would recommend welding some material back on and fixing it.

After the filing, I did use a fine rubber abrasive polishing but in my Dremel to smooth the surface out so the lock up process would be smoother.

After I had the fitting correct, I use the little bit of Brownells Oxpho blue liquid on Long dobbers and blued the surface followed by some oil.

That is all there was to it. I hope this helps you out. Kudos to CS specs for making some very nice magazines. These things are rock solid and I may very well pick a couple more up at some point.


If you find this post useful, please either buy something using one of the links to eBay and Amazon.  With Amazon, if you click on one of our links and then buy something else – even unrelated stuff like clothes, electronics and groceries – we get credit and it would be hugely appreciated.  Doing something like the above will help us fund continued development of the blog.



(Visited 139 times, 1 visits today)

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.