This DOM 2024 Aluminum air cylinder is a direct replacement for the stock Marauder Steel air cylinder. We have removed the factory gauge hole to free up additional internal air volume. This new air cylinder weighs 12.5 ounces, we require the use of our MDS Super Hammer with this product. This part only fits 2nd Generation Marauder's. Be careful not to over tighten the trigger assembly into the tube, torque specs should be a max of 18in-lb. The tubes are not equipped with an access port to the factory valve metering screw (transfer port restrictor). We've just had a request for it, so we'll be adding it to the next round of tubes. The tubes are just a touch under 24" long, because the raw material comes in 24" lengths, and then we tidy up both ends. This ends up being about 1/4" shorter than the factory tube.