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.

TEXAS 12 POUNDER CANNONBALL DANCE BROTHERS ANDERSON TEXAS 1864 65
TEXAS 12 POUNDER CANNONBALL DANCE BROTHERS ANDERSON TEXAS 1864 65
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GRAPE SHOT CANNON BALLS Civil War Authentic
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2 civil war cannon ball plugs dug side loader artillery plugs lead
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Cannon Ball 24 Pounder Solid Grape Shot Vicksburg Siege
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Confederate 4 Cannonball Found Dacus lake area Memphis
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Antique Heavy Civil War Era Cast Iron Grapeshot Cannon Ball 2 Inch Diameter
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3 HAND FORGED CANNONBALL HOLDER STANDS
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3 Civil War Canister  Grape Shot Cannon Balls Canon Ball Cannonball + BONUS
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5 Civil War Canister  Grape Shot Cannon Balls Canon Ball Cannonball + BONUS
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FORT MCHENRY12 POUNDER CANNONBALLBALTIMORE MD 1776 97  1812 14
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2 Inch Cannonball
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CIVIL WAR CANNISTER SHOT CANNON BALL
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Acrylic Ring 3 1 2 inch Cannonball Holder
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12 Lb CS Case Shot Sideloader Artillery Shell Cannonball
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HAND FORGED ARTILLERY CANNONBALL STAND
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Civil War Dug 32LB Solid Shot Cannon ball
Civil War Dug 32LB Solid Shot Cannon ball
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Time Remaining: 5d 3h 32m

FORT McHENRY 24 POUNDER SOLID SHOT CANNONBALL 1814
FORT McHENRY 24 POUNDER SOLID SHOT CANNONBALL 1814
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Original Canister Cannon Ball 1st Minnesota Monument Documented Gettysburg PA
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CIVIL WAR 10 POUND CANNONBALL WITH WOODEN STAND NO RESERVE
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Civil War Artillery Relic 9 lb Cannon Ball w seam
Civil War Artillery Relic 9 lb Cannon Ball w seam
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FORT SUMTER SOUTH CAROLINA 12 POUNDER CANNONBALL
FORT SUMTER SOUTH CAROLINA 12 POUNDER CANNONBALL
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Antique Civil War Cannon Ball Fragment Large Thick NOT Unearthed Kept Since War
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2 Civil War Canister  Grape Shot Cannon Balls Canon Ball Cannonball + BONUS
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Civil War era iron cannonball with stand canon gun artifact military army relic
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AUTHENTIC ANTIQUE CIVIL WAR DECK GUN CANNON BALL SHOT MINI BALL SHOT
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Civil War 2 Cannon Ball Cannonball Canon Ball Canister Shot Solid Iron A
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Civil War 2 Cannon Ball Cannonball Canon Ball Canister Shot Solid Iron B
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AMERICAN REVOLUTIONARY REPLICA MINIATURE CANNON AND CANNON BALLS ON A BASE
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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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Civil War Canon Ball Shot fragments Fort Early Lynchburg VA 1A13
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Cannon Balls and Cannon Shot
Cannon Balls and Cannon Shot
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Borman Cannonball Fuse Glorieta Civil War Site New Mexico
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Iron Cannonball Fragment Valverde Civil War Battlegound NM 3 4 thick
Iron Cannonball Fragment Valverde Civil War Battlegound NM 3 4 thick
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Irish Bowling Ball Cannonball
Irish Bowling Ball Cannonball
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Lot  2  Vintage Antique Cast Iron Cannon Balls Canon Ball Steampunk Art
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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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Rare Crude Huge Antique Civil War Relic Canon Ball 2 Canister Shot Confederate
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Cannonball Rare Shot Antique Vintage WaR OF 1812
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REPLICA 6 diameter civil war cannon ball made from cast aluminium unpainted
REPLICA 6 diameter civil war cannon ball made from cast aluminium unpainted
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1860s CIVIL WAR CHARLESTON SOUTH CAROLINA CANNON BALL ARSENAL ORIGINAL PHOTO
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ANTIQUE CIVIL WAR RELIC CANNONBALL 2 found at ElkmontAlabama on battle site
ANTIQUE CIVIL WAR RELIC CANNONBALL 2 found at ElkmontAlabama on battle site
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Civil War Grapeshot Cannonball
Civil War Grapeshot Cannonball
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ANTIQUE 1888 90th PA INFANTRY GETTYSBURG MONUMENT CIVIL WAR CANON BALL PHOTO
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CIVIL WAR COFEDERATE ARTILLERY 6 POUNDER CANNON BALL WITH BORMANN FUSE
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