Quick Compo - 2k vs Pre-2k Cockers

[Cdn_Cuda]

Next we’re going to look at the body and see the differences in how the internals are setup.

First, the view of the back of the markers. At first glance it looks pretty similar, but the IVG on the Pre-2k looks a little odd:


This is the second major difference. The 2k body has threading in the lower tube to allow for the IVG to adjust the velocity. The Pre-2k body does not have any threading. It uses an insert similar to what’s used in Spyders to hold the spring inside.



The IVG for the Pre-2k body is held on by a screw in the body. The 2k bodies have a similar screw hole, but that is used for mounting the beaver tail.


Now here is where my older pre-2k differs from the other pre-2k markers. My 1992 cocker had Sheridan style internals, so different hammer, springs and valve.
As there are no holes drilling into my body, you need to unscrew the hammer lug from under the body. In this photo my hammer’s lug has been install upside down, so you can unscrew it from the bottom. This is just a standard lug flipped.

[Cdn_Cuda]

So first things first, let’s look up front, where one of the biggest differences is:


I’ve removed the pump kits to show the front of the markers where the banjo bolt, or in this case the main pump rod is mounted. The Pre-2k has a much smaller hole than the 2k. Is is one of two major differences (IVG being the other) and is very important to know. It will affect the type of front block or pump kit you can use.

All the of the pre-2k bodies I have have the same sized banjo fitting.

Note, both these markers were set up for pump, and the 2k has had its vertical ASA (where you mount the reg) flipped. So the hole for the 3-way timing rod is on the wrong side of the marker. This can be done on either body stile.

[Cdn_Cuda]

While this likely common knowledge to most MCBers, I have a pre-2k and a 2k body on hand so thought I’d do a quick comparison for people looking to learn more about cockers. This is my first pre-2k cocker, so please feel free to correct me and/or add information.

As is usually the case, what I have on hand is a little but of a hodgepodge, and not the purest examples of Pre-2k and 2k, but will give people the general idea. I’ll point out the oddities and people can chime in and expand on this as well.

with all that out of the way, I present to you a late pre-2k cocker body (approx ‘95) and a 2k System X cocker body.

UPDATE: ended up with a couple more pre-2k cockers so will be updating with more info. One is approx 1992 and has Sheridan internals and the other? I’ll find out when take it apart.


I don’t have the cocking rod installed in the 2k body, but it will appear later. Note the back clock has a more angular design, almost a P-block, but it uses a standard 2k bolt.

Now the Pre-2k has a 2k back block, which means it can run a standard 2k bolt. Stock Pre-2k back blocks are larger, and stick out more, so pre-2k bolts are longer. Either bolt style can be used on a pre/2k body as long as they are used with their proper back block. So 2k back block with 2k bolt or a pre 2k back block with a pre 2k bolt will work.

Update: And here’s the couple more correct pre-2k lined up with my modified pre-2k body:


This lets your really see the difference between a 2k back block (shown at the bottom) and the standard chunky back block on the middle and top bodies.

For reference, the body that has the stock attached is serial number 17875 making it approximate 2005. My modified pre-2k the pump handle is a closely numbered 17472, making it the same vintage. The top body is 6805 which I believe is about 1992. Externally the bodies are all very similar if not the same. Internally, not so much.