Yes Alan is correct. I see they now have a version for the Gen 1 Marauders both without hammer and with a custom hammer. (I think you can drill out the stock one if you want and then get the one without the hammer.) As well as for the 2nd gen guns. I will be getting one soon for my gen 1. Very excited to try this!

Here is the link. Scroll to the bottom of the page to find these: http://wickedairrifles.com/store.html
 
Thanks for the question. It's not very complicated. The one I make....

1. Costs (much) less than the competing product.
2. Performs as well or better as verified in head-to-head testing.
3. One single version fits all Mrods.
4. Is a drop-in modification, requiring no metalwork and is actually externally invisible when installed.
5. Is available from two AGN sponsoring dealers.