| a. | Musket: a muzzle loading shoulder arm having a smooth bore and a barrel length exceeding 36 inches. |
| b. | Rifled Musket: a muzzle loading shoulder arm, originally manufactured as a smoothbore, now having a rifled bore and a barrel length of approximately 40 inches. (October 1998) |
| c. | Musketoon: a muzzle loading shoulder arms having a smooth or rifled bore and a maximum barrel length of 26.5 inches. (October 1992) |
| d. | Rifle: a muzzle loading shoulder arm having a rifled bore and a barrel length of approximately 33 inches. |
| e. | Rifle Musket: a muzzle loading shoulder arm having a rifled bore and a barrel length of approximately 40 inches. |
| f. | Carbine: a breech or muzzle loading shoulder arm having a smooth or rifled bore, using externally primed ammunition and a maximum barrel length of 26.5 inches. |
| g. | Revolver: any percussion revolver, suitable for general issue to military forces. |
| h. | Breech Loading Rifle: a breech-loading shoulder arm firing a black powder cartridge and having a barrel length of approximately 30 inches. (April 1990) |
| i. | Carbine II: a breech-loading shoulder arm having a rifled bore, using internally primed black powder ammunition and a maximum barrel length of 26.5 inches. (April 1990) |
| a. | As of June 2000, all arms being used in N-SSA competition which are individually produced replicas of Civil War arms must have a card showing inspection and approval by the small arms committee. |
| b. | A prototype example of any reproduction of an original Civil War firearm being produced by any individual or commercial concern at a rate in which production shall exceed two such arms per year. The prototype shall be accompanied by duplicate copies of a detailed description and/or drawings of the configuration (including principle dimensions and tolerances) of the arms that shall be produced and sold for use in N-SSA competition if approved. (January 1998) |
| c. | Any arm, original or reproduction, in which any major component (lock, stock, barrel, or sights) has been dimensionally altered, changed, or relocated in any way from the same part found on an original, unaltered Civil War arm of the exact same type, model, or variant, as issued or reissued prior to 26 April 1865. |
| d. | Any arm, original or reproduction, in which any major component is used which is of a type or style not intended by the original issuing authority for use on an original, unaltered Civil War arm of the exact same type, model or variant as issued or reissued prior to 26 April 1865. |
| e. | Any arm using a barrel not previously approved for use in N-SSA competition. |
| f. | Any arm that has the original manufacturer's identification removed or in any way altered. (August 1994) |
| g. | Production approval of reproduction arms, barrels and processes will occur only at the January or August board meeting. All shipping costs for materials submitted to the board must be paid by the manufacturer or distributor seeking approval. The N-SSA shall not assume and cost or liability for items submitted to the board for approval. (October 1996) |
| a. | Previously approved arms which have any major component part or parts replaced by the same major component part from another original or reproduction arm of the exact same type or model found on the N-SSA list of approved arms. |
| b. | Original or N-SSA approved arms on which an N-SSA approved barrel is used, provided the barrel is of a type intended for use on said arm. (Note: Any firearm, approved or not, is subject to a challenge and inspection for compliance with N-SSA rules. The burden of proof rests with the competitor (see also rule 4.8.4). |
| a. | FRONT SIGHTS may be modified or rebuilt provided the resulting sight is a metallic blade on an original type base, in the original location for the model of arm concerned, not to extend beyond the base and with no limitation as to height or thickness of blade. |
| b. | The addition of non-issue auxiliary front sights and sight hoods shall be prohibited. |
| c. | Barrels may not be altered (machined, drilled, welded, etc.) to receive rear sight alterations. |
| d. | REAR SIGHT modifications shall be limited to the modification of existing sight notches, substitution of new sight leaves or the addition of sighting holes in the sight leaf. Modifications to the new or original sight leaf shall not include additional thickness from that of the original model concerned. All rear sight leaves must be in the same position in the base as the original for the model concerned and the rear sight base must be in the same position as the original. The new sight leaf must function the same as the original. This rule shall apply to only simple leaf-type sights which consists of one or two sighting leaves with sighting notches or holes therein. |
| e. | Auxiliary rear sights or non-issue rear sight sunshades are prohibited. |
| f. | All sights and sight alterations shall be metallic. |
| g. | Sighting holes may be added to existing rear sights as long as the dimensions of the block, leaf, or ladder remain the same, and no additional material may be added except to fill a notch. (April 1990) |
| h. | Fixed-blade Kentucky-type rear sights may be modified only by the addition of an extra piece of metal to the rear sight. The addition should be the same width and no higher than 3/8" above the original sight height. |
| i. | Replacement leaves of the "L" type may be no higher than the height of the 300 yd. leg and the 500 yd. leg of the original sight leaf. |
| j. | Long-range or tangent sights may be modified only by the addition of metal to the vertical height of the sighting notch area of the ladder or slide. The added metal shall not exceed the width or thickness of the original area to which it is attached, and the total height of the notch area shall not exceed 3/8-inch. |

| k. | Front sights on revolvers and long arms may be secured to the barrel using a dovetail base in the original position. The attachment of the barrel-sight combination, after the insertion of the dovetail, must conform to the original configuration. The sight must be permanently affixed. There can be no method of adjustment built into the front sight. (April 1995) |
| a. | Tubular magazine-fed rifles and carbines may be used only with a centerfire conversion block and a specially modified flat-nosed follower mechanism with a diameter larger than the primer. (April 1991) |
| b. | All breech centerfire conversions which require a firing pin mounted within the breech or breech block shall utilize a spring-loaded `floating' type firing pin. (October 1998) |
| c. | Approved centerfire block conversions shall be stamped either upon the top or left side with distinguishing marks, names, etc. in a size large enough to be easily distinguished and visible when the action is closed. (April 1991) |
| a. | No reserve cartridges shall be carried outside of an approved cartridge box except for fixed ammunition loaded into the magazine of tubular magazine-fed firearms. (See also 4.16). On the line, at least one flap of the cartridge box must cover the cartridges at all times, except when a skirmisher is actually reaching into the box, or looking into the box to examine ammunition. (January 1998) |
| b. | The use of powder flasks or powder horns of any description, or loading from anything but prepared individual charges during company or individual matches, is prohibited. |
| c. | The use of combustible cartridges in muzzle-loading arms is prohibited unless the cartridge casing is completely combustible and is approved by the Inspector General. |
| d. | Ammunition for tubular magazine-fed firearms must contain a bullet with a flat nose of a diameter which exceeds that of its primer. (April 1991) |
| e. | Centerfire cartridges for use in Carbine II and breechloading rifles should approximate the size of the original rimfire cartridges used in these arms prior to April 26, 1865. (October 1991) |
| a. | The only allowable method of ignition for percussion or flintlock arms shall be percussion caps or flints. (April 1990) |
| b. | Caps shall be carried only in regulation-pattern cap boxes, and at no time shall the caps be exposed by either allowing the box to remain open while firing, or by the use of non- regulation cap-holders. |
| c. | Cappers may be used by revolver competitors when competing in individual and company events. (April 1996) |
| d. | In the use of flintlock firearms, priming powder must be provided as part of a prepared cartridge. |
| e. | Internally primed ammunition may use modern cartridge primers. (April 1990) |
| MUSKET | PISTOL | ||
| Company | Individual | Company | Individual |
| a. Musket | a. Musket | a. Revolver | a. Revolver |
| b. Rifle | b. Rifle | ||
| c. Rifle Musket | c. Rifle Musket | ||
| d. Rifled Musket | d. Rifled Musket | ||
| CARBINE |
|
||
| Company | Individual | ||
| a. Carbine | a. Carbine | a. Breech-loading Rifle | |
| b. Musketoon | b. Musketoon | b. Carbine II | |