Stock Barrel Bore Sizes
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This chart shows the measured bore sizes of various types of stock barrels that come with your marker. This information should then be used to buy the right size paint according to the size of your stock barrel's bore. A list of the paintball bore sizes can be found here. These measurements may differ from the ones the company advertizes--in which case I suggest that you should disregard the company's measurement. Each barrel was measured at both ends (breech and effective). If these two measurements are different, one should use the effective bore size to choose one's type of paintballs. All of the following measurements were done using a mil-spec fuel line bore gauge which is accurate to ±0.0005 caliber. List ordered by marker name.
| Barrel |
Breech Bore Size (ca) |
Effective Bore Size (ca) |
Bore Description |
| WGP STO Autococker |
0.687 |
0.690 |
Medium |
| WGP Autococker (1997-present) |
0.686 |
0.689 |
Medium |
| AKALMP Excalibur (note 10) |
Javelin |
Medium |
| ACI F4 Illustrator |
0.689-0.692 |
0.689-0.692 |
Medium/Large |
| ACI Maverick/Hornet |
0.690-0.692 |
0.690-0.692 |
Medium/Large |
| WDP Angel (1998 and earlier) |
0.689 |
0.689 |
Medium |
| WDP Angel (1999 and later) |
0.686 |
0.686 |
Small |
| Tippmann Model 98/98 Custom |
0.691 |
0.691 |
Medium |
| Tippmann Carbine/A-5 |
0.690-0.693 |
0.690-0.693 |
Medium/Large |
| Tippmann Pro-Lite/Pro-Am |
0.691 |
0.691 |
Medium |
| Tippmann SL-68II |
0.691 |
0.691 |
Medium |
| ICD Bushmaster |
0.689 |
0.692 |
Large |
| ICD Thundercat |
0.689 |
0.689 |
Medium |
| ICD Bobcat/Puma |
0.691 |
0.691 |
Medium |
| ICD Desert Fox (1997 and earlier) |
0.691 |
0.691 |
Medium |
| ICD Desert Fox (1998 and later) |
0.690 |
0.690 |
Medium |
| AGD Automag |
0.691-0.693 |
0.691-0.693 |
Medium/Large |
| AGD Automag RT |
0.690-0.691 |
0.690-0.691 |
Medium |
| Kingman Spyder |
0.691 |
0.691 |
Medium |
| Pro-Team Products Micromag* |
0.689-0.694 |
0.689-0.694 |
Medium/Large |
| Smart Parts Impulse** |
Progressive - 0.689 |
Medium |
| Smart Parts Ion |
0.689 |
0.689 |
Medium |
| Smart Parts Evolution Autococker** |
new-style All American - 0.689 |
Medium |
| Smart Parts Nerve** |
Freak |
varies |
| Smart Parts Shocker (1998-2001)** |
old-style All American - 0.689 |
Medium |
| Smart Parts Shocker (2001)** |
one-piece All American - 0.689 |
Medium |
| Smart Parts Shocker (2002-present)** |
new-style All American - 0.689 |
Medium |
| BrassEagle Rainmaker (1998 and earlier) |
0.690 |
0.690 |
Medium |
| BrassEagle Rainmaker (1999 and later) |
0.691 |
0.691 |
Medium |
| BrassEagle Raptor |
0.692 |
0.692 |
Large |
| Component Concepts Phantom |
0.692-0.693 |
0.692-0.693 |
Large |
| AirStar Nova |
0.687 |
0.692 |
Large |
| Sheridan PGP/P68-AT/P68-SC |
0.684-0.688 |
0.684-0.688 |
Small |
| PMI Titan |
0.715 |
0.685 |
Small |
| ANS '99 X2 Autococker |
0.687-0.689 |
0.687-0.689 |
Medium |
| AKALMP Viking* |
Javelin - 0.687 |
Medium |
| AKALMP Excalibur* |
Javelin - 0.687 |
Medium |
| USA Viper standard (1998 and earlier) |
0.6915 |
0.6915 |
Medium |
| USA Viper standard (1999 and later) |
0.6935 |
0.6935 |
Large |
| USA Viper ceramic-teflon |
0.691 |
0.691 |
Medium |
| USA Viper nickel-teflon |
0.6895 |
0.6895 |
Medium |
* This marker comes with a barrel that isn't smooth internally. The bore is composed of many small polygons arranged in a spiral pattern. It's difficult to measure these types of bores.
** This marker comes with an aftermarket barrel listed in the next cell.