Cannon Ball

How do I build (safe and legal)a tennis or golf ball cannon?

I want to know how to build a safe and legal cannon to shoot either tennis or golf balls.

Will high pressure pvc work?
Thanks.
what do I do?
I want to launch a small, non-lethal object a few hundred feet.

well No.1 there isn't any such thing as a legal cannon. Or potato gun. I have made several and nothing as it turns out is legal.I made several with schedule 40 PVC that have exploded in our faces. I am currently working on one that shoots T-Shirts into crowds for stage shows. I can't disclose those details yet. I am still in the final steps and it will be patented. I will however follow up on this at a later time. (nothing is safe that shoots) Please don't mess with this.

GREAT CIVIL WAR 3LB SOLID SHOT CANNONBALL FOUND  GETTYSBURG  EXC CONDITION
GREAT CIVIL WAR 3LB SOLID SHOT CANNONBALL FOUND GETTYSBURG EXC CONDITION
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Civil War Canister Shot Grape Shot or Small Cannonball Holder
Civil War Canister Shot Grape Shot or Small Cannonball Holder
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CIVIL WAR CANNONBALL FROM THE BATTLE OF VICKSBURG
CIVIL WAR CANNONBALL FROM THE BATTLE OF VICKSBURG
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CANNON BALL
CANNON BALL
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Dug Civil War Artillery Relic 15 inch Cannonball Vicksburg
Dug Civil War Artillery Relic 15 inch Cannonball Vicksburg
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ORIGINAL CIVIL WAR CANNONBALL FROM PORT REPUBLIC VA SOLID SHOT CANNON BALL
ORIGINAL CIVIL WAR CANNONBALL FROM PORT REPUBLIC VA SOLID SHOT CANNON BALL
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ANTIQUE CIVIL WAR DUG RELIC 310 LB CANNONBALL CANNON BALL
ANTIQUE CIVIL WAR DUG RELIC 310 LB CANNONBALL CANNON BALL
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Antique Cast Iron Civil War Vtg Cannon Ball 45 Pounds approx 21 2In Diam
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Civil war cannon ball
Civil war cannon ball
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3 9 16 Dia IRON CANNON BALL  DUG BATTLE OF STONES RIVER TN
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Antique Civil War Cannon Ball Fragment Large Thick NOT Unearthed Kept Since War
Antique Civil War Cannon Ball Fragment Large Thick NOT Unearthed Kept Since War
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LARGE SECTION OF A 12 POUND CANNON BALL CIVIL WAR RELIC
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LARGE SECTION OF A 12 POUND CASE SHOT CANNON BALL CIVIL WAR RELIC
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Big Chalkware Civil War Union Soldier Pin Up Girl W Cannon Ball Numbered
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2 Civil War Canister  Grape Shot Cannon Balls Canon Ball Cannonball + BONUS
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Civil War 12Pdr Cannon ball Fragment dug Hills Point Battery Suffolk VA
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Irish Bowling Ball Cannonball
Irish Bowling Ball Cannonball
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Cast iron cannon ball
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Three Civil War Cannon Ball Shell Fragments From the Battle of Resaca  GA
Three Civil War Cannon Ball Shell Fragments From the Battle of Resaca GA
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3 CANNON BALL SOLID SHOT
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Cannon Ball Stand of Grape 32 pounder Vicksburg Siege
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Old Rare Vintage Antique Civil War Relic Confederate Cannonball 2 Grape Shot
Old Rare Vintage Antique Civil War Relic Confederate Cannonball 2 Grape Shot
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BATTLEFIELD FOUND CIVIL WAR CANNON BALL 3
BATTLEFIELD FOUND CIVIL WAR CANNON BALL 3
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BATTLEFIELD FOUND CIVIL WAR CANNON BALL 2
BATTLEFIELD FOUND CIVIL WAR CANNON BALL 2
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BATTLEFIELD FOUND CIVIL WAR CANNON BALL 1
BATTLEFIELD FOUND CIVIL WAR CANNON BALL 1
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BATTLEFIELD FOUND CIVIL WAR CANNON BALL 4
BATTLEFIELD FOUND CIVIL WAR CANNON BALL 4
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BATTLEFIELD FOUND CIVIL WAR CANNON BALL 5
BATTLEFIELD FOUND CIVIL WAR CANNON BALL 5
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BATTLEFIELD FOUND CIVIL WAR CANNON BALL 6
BATTLEFIELD FOUND CIVIL WAR CANNON BALL 6
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LARGE CANNONBALL STAND MILITARY CIVIL WAR REVOLUTIONARY WAR
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Civil War Cast Iron Mortar Cannon Ball 8 44 Pounds Spherical
Civil War Cast Iron Mortar Cannon Ball 8 44 Pounds Spherical
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BATTLE  SIEGE OF VICKSBURG MiSSiSSiPPi CIVIL WAR Cannon Ball With COA  DISPLAY
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2 inch Civil War era cannonball great patina artifact militaria cannon shot rel
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CIVIL WAR ORIGINAL RELICS DUG EXPLODED ARTILLERY SHELLS or Cannonball B
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CIVIL WAR ORIGINAL RELICS DUG EXPLODED ARTILLERY SHELLS or Cannonball Bullet
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Civil war cannonball fragment
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VINTAGE CANNONBALL CIVIL WAR REVOLUTIONARY WAR
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Civil war dug cannon ball piece found in Ga
Civil war dug cannon ball piece found in Ga
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8 lb CANNON BALL
8 lb CANNON BALL
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Vicksburg Civil War Dug relic Artillery GENUINE CannonBall 6lb 367 inch
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Vicksburg Civil War Dug relic CS Artillery 6lb Borman fused CannonBall
Vicksburg Civil War Dug relic CS Artillery 6lb Borman fused CannonBall
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CIVIL WAR ORIGINAL RELICS DUG EXPLODED ARTILLERY SHELLS or Cannonball Bullet
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CIVIL WAR ORIGINAL RELICS DUG EXPLODED ARTILLERY SHELLS or Cannonball Bullet
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Civil War Cannon Ball Fragment east of Glorieta NM
Civil War Cannon Ball Fragment east of Glorieta NM
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Cannon Ball Frag fuse hole Civil War Ft Union NM
Cannon Ball Frag fuse hole Civil War Ft Union NM
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ORIGINAL NON DUG CIVIL WAR 6 lb 3 inch CANNON BALL rifle shell w paper US CS
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Borman Cannonball Fuse Glorieta Civil War Site New Mexico
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Vintage Original 4 9 Pounder Cannon Ball Antique Cannon Ball
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Vintage Original 4 9 Pounder Cannon Ball Antique Rare Cannon Ball
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Civil War Cannonball Cannon Ball 6lb
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cannon ball war 16 17 sec about the war Turkish
cannon ball war 16 17 sec about the war Turkish
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1 Civil War Canister  Grape Shot Cannon Ball Canon Ball Cannonball + Bonus
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Original  Authentic CIVIL WAR or Earlier 9 Pound Cannon Ball 4
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CIVIL WAR UNION ARTILLERY 6 POUNDER CANNON BALL WITH BORMANN FUSE CORINTH MS
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REPLICA 6 diameter civil war cannon ball made from cast aluminium unpainted
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ANTIQUE CIVIL WAR ERA CAST IRON CANNON BALL 2 INCH DIAMETER FROM ALTON IL
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1860s CIVIL WAR CHARLESTON SOUTH CAROLINA CANNON BALL ARSENAL ORIGINAL PHOTO
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Antique Heavy Civil War Era Cast Iron Grapeshot Cannon Ball 2 Inch Diameter
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CIVIL WAR ARTILLERY 6 POUNDER SOLID SHOT CANNON BALL IN CEDAR TREE
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DISPLAY STAND Civil War cannonball canister grape shot cannon balls DISPLAY
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CIVIL WAR COFEDERATE ARTILLERY 6 POUNDER CANNON BALL WITH BORMANN FUSE
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Rare Crude Huge Antique Civil War Relic Cannon Ball 2 Grape Shot Confederate
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European Bowling Game Irish Bowling Ball Cannonball
European Bowling Game Irish Bowling Ball Cannonball
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3 Civil War Canister  Grape Shot Cannon Balls Canon Ball Cannonball + BONUS
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Civil War Era Cannonball
Civil War Era Cannonball
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CIVIL WAR CONFEDERATE ARTILLERY 12 POUNDER CANNON BALL WITH BORMANN TIME FUSE
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Civil War Cannonball Fragment Valverde Battlefield NM 3 1 2 x 3 1 2 1 lb +
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Fort Blakely Alabama Civil War Cannonball Fragment
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