CQB Varmint Terminator – TRCK’d Out Marlin 60

I received my Elftmann Tactical Rifle Conversion Kit (TRCK) from Young Manufacturing today. There isn’t much information out there on this marlin 60 aftermarket stock, so I wanted to document my install. I will follow up again once I get some rounds through it downrange. However, I fully expect it to perform just like it did before I changed the stock… that is, bring dread into the hearts of rodents anywhere within 50-75 yards of my position. :)

It is not in my nature to be overly prepared for tasks. Not that I don’t have the right stuff to do something, it’s just that the kid in me jumps out into a task I know will be fun without a lot of pre-work. I am notorious for measuring 3/4 of a time, cutting 2-3 times, and then calling in more skilled reinforcements. Plumbers and masons salivate at the idea of me trying to work on something. But when it comes to my firearms – tools for gathering food and potentially saving a life – I treat them like I treat my job in the nuclear industry – with care and pre-planning. So here are the tools needed to install the Marlin 60 into the TRCK:

  • Allen Wrenches – 3/32″ & 9/64″
  • Roll Pin Punches – 3/32″, 7/32″, 5/16″*
  • Hammer
  • Flathead Screwdriver


Before getting into the install I took a few minutes to catch my breath and check out the TRCK. The trigger and safety are solid metal which is an improvement over the relatively flimsy plastic safety on the stock Marlin. Right behind the trigger is the Hogue-wrapped pistol grip. I love the feel of Hogue grips (have one on my carry  weapon, too) and it was a very pleasant surprise to find it on the TRCK. Many cheap aftermarket stocks are just that. But the Elftmann grip and trigger are good quality.


Finally it was time to get into the install. First you remove the existing stock from the Marlin [flathead]. You also remove the vented barrel cover from the Elftmann at this point [3/32" allen wrench].

After opening up the TRCK and the Marlin, you remove the action from the Marlin and punch out the forward pin on which the action rides. I was curious why this was necessary, but a little looking as I reassembled made it clear the existing Marlin hardware is too wide to fit into the TRCK frame. Below is a shot of the Marlin action disengaged and the forward and rear pins removed. I used the 3/32″ punch to actually do the work but I used the handle of my 5/16″ punch to rest the block in which the pin sits. I basically laid my punch down in parallel with the tube magazine and let the handle end rest against the bottom end of the pin. This took a bit of fiddling to work out, but only cost me a minute or two of mid-task thinking.

Once the new forward pin is installed, reinstall the action and use the provided rear pin (also shorter than the OEM pin). The new pin does not snap in like the OEM version. Here is the action reinstalled with both pins in place.

The photo below is a shot of the internal aactuating mechanism that is coupled to the trigger shoe, which sits well forward in this bullpup design. Just behind this mechanism (left in this picture) is where the rear pin sits. There is very little clearance between the sides of the TRCK and the Marlin action. The pins/e-clips that hold the Marlin action together catch on the top right edge of the TRCK during installation. The longest part of the my install was working the Marlin action into the TRCK frame. I was able to get all but the topmost pin past the frame lip by hand. In the process, I dropped the new rear pin multiple times… frustrated.

Deep breaths… think. OK. After working the action in to the last pin, I got it to the point where I needed the frame to miraculously bend out of my way. I grabbed my cleaning kit T-shirt and the hammer (not in PLANNED tool list). A couple of very gentle taps and pop – in like Flynn. After getting the action in, I stood the pieced upright and gave it a little bit of vertical mechanical agitation (I bumped the stock on the ground) to seat the action and align the holddown ports. Then I installed the cover plate as shown below. This leaves the last shot hold open (LSHO) release easily accessible. The TRCK also ships with a shorter cover for use if you have a Marlin 795 (or other magazine fed model). I requested both as I eventually want to pick up a 795 and I wasn’t sure on the spot when I ordered on which rifle I would want to keep the TRCK mounted.

When I initially inquired about the TRCK I was concerned about inadvertently making a NFA Class III short-barreled rifle (<16″ barrel or overall length <26″) since I have the Marlin 75C, a shorter carbine-length version built in the mid-80s through the mid-90s. Before even putting the cover on I measured the overall length (I wasn’t changing the barrel length). It comes in at a solid 26.5″ – WHEW! Love it when I’m not a felon. Heart rate down now, I installed the cover.

After installing the cover, the only remaining step is to reinstall the barrel cover. For display purposes I mounted my 3-9×40 Redfield scope on the newly minted CQB Varmint Terminator. After thinking about it a bit, the ACOG on my rifle when I was deployed was a 4x and we did CQB drills constantly. So I may keep it on there… I can see where I’m aiming on a deer with my Aimpoint and gather more light. With the setup below, I can keep it at 3x for normal use and kick it up to 9x if I want to hit the squirrel in the upper left incisor.

Overall, the installation was about as simple as it gets. It took me less than 30 minutes to complete, including the time I spent frustrated by the action installation into the frame and the time I took to get all of these pictures. Cake…

I checked the function and everything seems in order (curses… should’ve picked up some .22 snap caps) I’m excited to shoot this bad boy. I will report back when that happens.

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