What you are about to witness is not a dream. It's a 'future reality' I'm working on a simple design for a semi-automatic paintgun that will be the most accurate paintball gun ever built. At least that's the theory. If you've read my article on Venturi Bolts, you know the theory behind this particular marker design. The design below is intentionally very simplistic. It is the prototype. I have deliberately chosen to use as many pre-existing parts as possible in the design to limit the number of parts which I will have to construct myself. I'm using a ton of Autococker parts. In fact, virtually everything but the body and valve itself. The grip-frame, ram, regulator, 3-way, hammer, and cocking rod are all from an autococker. Only the body, valve, and gas block will be custom made. The design will also use autococker barrels. A future version may or may not use entirely unique parts. I have not decided. There is a twisted logic to using Autococker parts as there are already so many of them available as aftermarket 'hop ups'. The future design will (hopefully) incorporate a mechanism allowing either the barrel or the body of the gun itself to be pivoted out of the way to allow for quick barrel cleaning. There is some difficulty in accomplishing this due to the closed bolt design.
A brief rundown of features- operations system.
A closed bolt semi-automatic with an inline valve system. There is not a single other closed bolt inline valve semi on the market. Though putting an auto-cocking system like the Chameleon on a Nelson-based pump gun results in a closed bolt inline valve semi.
Uses autococker barrels.
Convertable gravity feed on future model. Powerfeed that can be switched side to side or replaced with a verticle feed for hoser/idiots.
Prototype will use autococker sliding trigger and 3-way. Later model may use a breakover pivoting trigger and a 4-way similiar to the Vector's. Issues of bulkiness vs performance to be resolved here. Also issues of customizeability. The Vector trigger is more user friendly but difficult to tailor to user tastes. It is a one size fits all proposition. Really considering the later as it is a pivot trigger. Would love to use a pivot because they are effective when combined with a double finger trigger. I'm praying that I will come up with a way to make it an on/off reactive trigger. I think these will become tourney legal now that super-semi's have been approved. BTW: Someone explain to me just how electronic trigger bounce can possibly be considered 'multiple trigger pulls' while a reactive trigger is considered a 'single trigger pull'. This is such pure B.S. that it really gets my blood boiling. At least with a reactive trigger you have to release the trigger to fire a second shot. Not so with 'turbo-mode' electronic triggers. Just thinking about my Project 'X' marker with a pivoting double finger trigger and optional reactivity makes me grin evilly too. I could become the king daddy of all hosers. . .
I am developing a possible 'Split two finger trigger' which fires single shot on the upper trigger and in reactive mode on the lower trigger. The lower trigger would be lockable for fields where reactive triggers are not allowed. This would be a pivoting trigger to give maximum performance.
Final design being tailored with customization in mind. The ability to customize and personalize the marker is key to its continuing success.
Nelson spring kit provides adjustable velocity.
A far-future model may be electro-pneumatic.
1: Start of Trigger pull. Trigger begins rearward travel, releasing sear.
2: The Hammer, under pressure from the main spring, travels forward and impinges upon the valve stem.
3: The valve stem/power tube travels foreward, exposing the Power tube ports.
4: Gas from the valve body enters the power tube ports, travels down the power tube into the bolt. The 'venturi' bolt diffuses the gas evenly (We hope) applying momentum to the paintball, propelling it from the muzzle. (In other words, it shoots)
5: The valve spring recloses the valve. Pressure from the air tank recharges the valve now.
6: Continued rearward travel causes the 3-way valve to open. This sends a charge of regulated gas to the front of the ram.
7: The ram travels rearward.
8: The bolt and cocking block are slaved to the ram. Rearward travel of the bolt causes a paintball to drop from the gravity feed into the breech. Rearward travel of the cocking block causes it to encounter the cocking rod head. The cocking rod is slaved to the hammer. It's rearward travel causes the hammer lug to reengage the sear, cocking the marker.
9: The trigger reaches its maximum rearward travel and is released.
10: Foreward travel of the trigger reverses the action of the 3-way. A burst of gas is directed to the back of the ram.
11: The ram travels foreward. Pulling the bolt and cocking block with it. The bolt chambers the paintball that previously fell into the breech. The cocking block returns to its at rest position. Note that the cocking rod is NOT slaved to the cocking block. Only the head of the cocking rod contacts the cocking block during its rearward travel. The cocking block slides freely over the cocking rod without carrying it along during foreward travel.
12: The marker is now completely reset and the process will begin again at the next trigger pull.
Construction of the prototype will begin not long after I have purchased a Lathe/Mill. I have already collected all of the spare autococker parts with the exception of a grip frame and trigger components. I hope to be adding those to my pile soon. I will likely uses an aluminum tube for the body. Assuming I can find one with suitable internal and external diameters. I don't want to use bar-stock if I can avoid it due to the difficulty of accurately boring it. It would be far easier to find oversized tube stock and bore it out.
The current stumbling block is the development of a 'gas-block'. The design still doesn't have anything in the way of an ASA or a place to mount the ram, reg, and 3-way. As my goal is to design such a system that will be easily constructed with my limited skill. I am considering the possibility of a 'reversed' operation with the 3-way built into the grip itself. This probably will not happen however.
Stay Tuned.
scarecrow