Paintball gun

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Executive Summary

Customer Needs

How System Functions

The paintball gun (or paintball marker) fires a 0.68 inch diameter paintball at speeds of around 280 fps using compressed air in a semi-automatic firing style. This means that after cocking the marker once, when you pull the trigger it will fire a paintball and also recock the marker for you. This allows the user to rapidly fire paintballs.

Before you can fire the gun, the bolt must be in the cocked position. This is accomplished by pulling the cocking pin back until you hear a click. This is only done once at the beginning of use. When the bolt is pulled back, the Venturi Bolt slides back in the marker barrel (shown in red) which allows a paintball to fall through the feed neck and into the marker barrel. The cocking pin is also connected to the striker bolt, which slides back in the striker chamber (shown in yellow) engaging the trigger mechanism (the trigger mechanism will be described separately in the next section). When the striker bolt engages the trigger mechanism, it is locked in the back position. This causes the striker spring to apply a force to the back of the striker bolt.

In this cocked position, the air reservoir (shown in blue) is filled with compressed air. This chamber is sealed off from the rest of the gun by the cup seal and valve pin assembly. This assembly is being pressed against the valve body (shown in green) by the valve spring. The valve body has three holes, one into the the air reservoir, another into the striker chamber, and a final leading up into the marker barrel. The valve pin extends through the valve body and into the striker chamber.

When the trigger is pulled, the striker spring pushes the striker bolt forward. The striker bolt strikes the valve pin, which opens the seal the valve pin and cap seal were creating with the valve body. Since the striker bolt and venturi bolt are connected, the venturi bolt also moves forward. Before the venturi bolt reaches the front position, it comes in contact with the paintball and pushes the paintball forward toward the barrel. Since the seal in the air reservior was opened, compressed air flows through the valve body into the striker chamber and the marker barrel. The compressed air that flows into the marker barrel accelerates the paintball out of the barrel, firing the paintball marker. The air entering the striker chamber forces the striker bolt back into the cocked position. At this point the valve spring pushes the cap seal and valve pin back against the valve body, sealing the air resevior again. With everything returned to the cocked position, another paintball falls into the marker barrel and the gun is ready to be fired again. The whole process from trigger pull until the gun cocks itself again occurs in less than a second.

Components

Part #	Part Name	Qty	Function	Weight (Ounces)	Material	Manufacturing Process
01	Hopper Connection	1	Connect hopper and feed neck	0.7	Plastic	adffadf
02	Hopper Connection Bolt and Nut	2	Apply pressure to plastic hopper connection housing	0.4	a;lskdjf	;alsjkdf
03	Stock	1	Helps stabilize gun against shoulder for improved accuracy	8.7	a;lskdj	a;lsdkjfk
04	Barrel	1	Direct paintball exit out of marker	4.7	a;lsdkfj	;lasdlkjfj
05	Feed Neck	1	Direct paintballs from hopper into firing chamber	0.6	a;sdljkf	a;ldfjk
06	Feed Neck Screw	3	Attach Feed Neck to marker body	0.1	a;lsdkjf	;laskjdf
07	MR1 2" Dovetail Drop Forward	1	Bracket to secure compressed air connection port to trigger handle	1.2	a;lkdsjf	;ajdsf;lakj
08	Drop Forward Lock Screw	1	Secures Dovetail Bottom-Line to Dovetail Drop Forward	<0.1	a;lsdkjf	;laskjdf
09	MR1 Dovetail Bottom-Line	1	Connection point between compressed air and hose to marker body	3.2	a;lsdkjf	;laskjdf
10	Hose Adaptor	1	Connect hose to Dovetail Bottom-Line	0.4	a;lsdkjf	;laskjdf
11	MR1 Foregrip	1	Provides cover for hose connection to marker body.	4.9	a;lsdkjf	;laskjdf
12	Foregrip Fixing Screw w/washer	2	Connect foregrip to marker body	0.4	a;lsdkjf	;laskjdf
13	Braided Hose	1	Connects Dovetail Bottom-Line to marker body	1.8	a;lsdkjf	;laskjdf
14	Screw and Washer	2	Connects trigger handle to marker body	0.1	a;lsdkjf	;laskjdf
15	Handle Covers	2	Provides comfortable grip for handle	0.8	a;lsdkjf	;laskjdf
16	Screw	4	Connects handle cover to handle	0.1	a;lsdkjf	;laskjdf
17	Handle Trigger Assembly	1	Allows user to control firing of paintball. Double trigger controls release of bolt, firing paintball	9.4	a;lsdkjf	;laskjdf
18	MR1 Reservoir Plug	1	Seals compressed air resevoir and includes attachment point for valve spring	0.8	a;lsdkjf	;laskjdf
19	M5x12 Screw	1	Attaches Reservoir Plug to marker body	0.1	a;lsdkjf	;laskjdf
20	Valve Spring	1	Provides pressure against cup seal to press valve pin into valve body	0.1	a;lsdkjf	;laskjdf
21	Cup Seal and Valve Pin Assembly	1	Seals hole in valve body so air does not leak out of air reservoir	0.2	a;lsdkjf	;laskjdf
22	Valve Body	1	Routes air to Striker chamber and also to MR1 Venturi Bolt.	0.2	a;lsdkjf	;laskjdf
23	MR1 Venturi Bolt	1	Directs air from valve body to paintball. Also stops additional paintballs from entering chamber when firing.	<0.1	a;lsdkjf	;laskjdf
24	Cup Seal Guide	1	Centers Cup Seal and Valve Pin Assembly in air reservoir	0.1	a;lsdkjf	;laskjdf
25	Striker Spring	1	Applies force to Striker Bolt, accelerating it into the valve pin	0.1	a;lsdkjf	;laskjdf
26	Striker Plug	1	Seals Striker chamber. Also includes a spring guide for the Striker Spring	0.8	a;lsdkjf	;laskjdf
27	Striker Buffer	1	Helps protect Striker Plug and Striker bolt from damage during use from impact	<0.1	a;lsdkjf	;laskjdf
28	Striker Bolt	1	Strikes Valve Pin, releasing air from air reservoir, through valve body and MR1 Venturi bolt. Striker Bolt releases when trigger is pulled.	2.4	a;lsdkjf	;laskjdf
29	Quck Disconnect Pin	1	Secures Striker Plug to marker body	0.3	a;lsdkjf	;laskjdf
30	MR1 Venturi Bolt	1	Directs air from valve body to paintball. Also stops additional paintballs from entering chamber when firing.	1.6	a;lsdkjf	;laskjdf
31	MR1 Pull Pin Cocking Knob	1	Connects Venturi Bolt to Striker Bolt. When Striker bolt is forced back into the cocked position by the compressed air, this pin pulls the Venturi Bolt back into the cocked position also.	0.4	a;lsdkjf	;laskjdf
32	Marker Body	1	Houses main components of paintball gun including, venturi bolt, striker, and valve assemblies. The barrel, trigger assembly, and stock also attach to the body	14	a;lsdkjf	;laskjdf
33	Misc. O-rings	1	O-rings help seal all the different chambers so compressed air does not leak out. This increases the efficiency of the paintball marker	<0.1	a;lsdkjf	;laskjdf