Scott Dew, owner of the CDM Gear shared the very interesting story of creation of his unique clamps:

CDM Gear Clamps
CDM Gear Clamps

So, I started making clamps about 4 years ago but I actually started out doing a lot of custom, one-off stuff for people. I was also designing an adapter like the Mesa Tactical stock adapter about the same time they did. This all started with the FN TPS shotgun. You may know that it has a stock that adapts an AR15 stock and pistol grip to the shotgun. I liked the look and started developing my own.

Mine was a little more complex and had a built in scope rail. It was going to be investment cast and then machined. It was really nice and better than anything on the market. I didn’t make it because Knoxx was coming out with a recoil reducing stock and I felt that it would revolutionize the stock adapter industry.

I didn’t want to sink a lot of money into something that was going to be outdated so I stopped development. Looking back, I should have continued ahead with my plans…and I still might.

In the meantime I was still making clamps but they looked like everyone elses out there. I like simplified form and after looking at the clamp assembly with the scope ring and the rail and everything I felt there was a better way. It litterally came to me in my sleep and I got up about 3 in the morning and started drawing the cad work for the MOD-C, which stands for Multi Optional Design Clamp. I’ve included a .jpg so you can get an idea of where the idea came from.

CDM Clamps
CDM Clamps

I also worked on the patent, which is still in process. I have a provisional patent that will be converted to a regular patent application in February. I will be doing the actual patent work as well.

The clamps can interchange with other components as well, such as rails and the Sling Swivel dock. The sling swivel dock is made out of steel, instead of aluminum. I believe the steel to be a better way to go than aluminum for long term durability.

Since the sling swivel dock needed a hole for the sling swivel, I lined it up with the bolt hole for the clamp. I followed through with the rails putting an access hole in the same place for the clamp.

With other clamps you need to take the rail off to take the clamp apart. You don’t need to do that with mine. I am the only maker that does this. I also wanted to have the light or laser as close to the shotgun as possible. I don’t believe there is another railed clamp out there that holds the light as close to the shotgun as mine does. It is also the lightest of it’s kind on the market.

Scott, thank you very much for sharing this story with me and readers of the Rem870 blog!

More information about CDM Clamps:


  1. Very cool Scott, I believe you should press on with the stock adapter. This is a huge market and people will not hesitate to purchase the latest greatest thing even if they have to get on a waiting list. I waited well over a month before I received my Mesa stock kit but I wanted a solid quality product, so the wait was irrelevant. It looks like you too have a line of quality products and there are plenty of people who will spend the time and money involved in obtaining them. Keep up the good work and good luck in your endeavors.

    Take care, J.R.

  2. Theodore

    Dear Scott,

    Great products. Please produce as much as posible. I am trying to purchase from abroad (Europe), but everyone in the US informs me they are sold-out. Regardless, I wont settle for second best. Do you have any plans for us European fans ???.


  3. CDM Gear

    I would love to sell in Europe, but ITAR regulations do not allow me to ship outside the country. I have thought about having some made in Canada because I get a lot of inquiries from there. One manufacturer has offered to make them there but then you loose control over your product, as opposed to going through a vendor. Vendors are busy here and there is a lot of back ordering going on, which I don’t do. I don’t like holding on to peoples money for an undisclosed time frame. I do, however, have a waiting list email set up so people don’t have to part with their cash. I just recently released a lot of parts and filled my waiting list orders (starting in November of 2009). It worked out really well.
    As for the stock adapter, I probably won’t be doing it. There are a lot of good offerings out there already, but it was fun designing it. There was a big question at the time over patents and word spread that the owner of the patent for the adapter (the one your see on the FN TPS) was sending out cease a desist orders. It was said that this idea was already done (prior art) and that the patent was void. Others I know paid a licensing fee to produce under the patent. My design worked around that and actually had a removable plate where you could swap out the stock with a different shotgun without having to buy a whole new stock kit. This got around the patent because the stock kit bolted to an adapter, not the shotgun, and presented a different approach to attachment and use. I was also working with a guy from Arizona (Adam O)on the Stock Shox stock. Adam had a patent on a shock absorbing bicycle seat and worked in the prosthetics field. He adapted the shock absorbing technology of the seat to the shotgun stock. Although shock absorbing shotgun stocks are not new to the industry, this AR15 style stock was prior to anything that was in the shock absorbing field at that time as far as I know. It was basically the same as the Enidine recoil buffer system only this used a synthetic polymer recoil dampener. I still have one of the stocks here and a bunch of photo’s of the product. It used an Armstech TSA adapter with a special ring to hold the recoil stock. I told the guy to ditch the TSA adapter and use my stock adapter and he would have a winner. Well, he never moved on it. I had placed several calls trying to get something going but the last I heard, there were a lot of these manufactured already and sitting in a customs warehouse for taxes. He didn’t want to pay the taxes for some reason, I don’t know if it was true or not, but that project died. Shortly after that, Knoxx came out with theirs and I felt that industry was spoken for and not worth pursuing.

  4. Hey CDM, Just wanted to let you know I’m a member of SGW also and I read about that BS with S&J! I and most likely we are behind you 100%.

  5. CDM Gear

    Just to update the S&J thing, I was in talks with them about having them make my clamps in Canada back in December but told them I couldn’t do anything then because of all the other things I was dealing with at the time. It never even dawned on me to look at their website after that but someone recently wrote me and told me about seeing my products up there and asking about warranty coverage. I guess because I was out of stock they were trying to get a clamp where ever they could and wanted to know if I would cover any problems. After a quick legal consult I was told it could be huge trouble, liability wise, for me if someone is using my name and producing product. After an email to S&J I was told that the person who does their website put that information up there under the belief that we would, one day, be doing business, and it was forgotten about. Without getting into all the details I was told it would be taken down and I’m good with that. Since all this, we’ve emailed back and forth and are again talking about S&J making clamps for Canada, which could be shipped to Europe. All in all, it’s better that we work together to accomplish more so everyone benefits if we can work out the details. I have to commend Simon at S&J for his speedy reply in addressing the issue and we’ll see how things work out in the future.

  6. Patrick Cimo





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