Higher spring load, longer barrel, designed for expanded plunger tube. FPS should be around 180FPS range.Parts included:- Metal Breech- Metal Barrel- Spring (28n long spring)- Breech Oring- Full Length Breech (FREE)Choice of front adapter(Sold Separately)- Metal Stefan Kit Front Muzzle Adapter- Plas..
Lower spring load and designed for normal/stock plunger tube. FPS should be around 125-130FPS range. Requires a separate Worker Stefan Adapter to work with.Parts included:- Metal Breech- Metal Barrel- Spring (est 7+KG)- Breech Oring- Full Length Breech (FREE)Choice of front adapter(Sold Separately)-..
Should fit normal plunger tube too but you need this if you want to use expanded tube or you can shave your current bolt sled to make it fit.Parts included:- Bolt Sled- Bolt Sled Pin..
Parts included:- Expanded Tube- Plunger Rod- Oring- ThumbscrewTo fit this expanded tube kit in Worker shell, you will need to trim the plunger tube support as shown in the picture. This will allow you to fit the expanded tube in but to utilise the longer spring that is recommended for the expanded p..