Editing M634 Experimental High-Powered Semi-Armor-Piercing

{{Status|Canon}}
[[File:Ammo_-BR.png|thumb|150px|An M634 9.5×40mm KURZ from ''[[The Art of Halo 3]]''.]]
'''M634 Experimental High-Powered Semi-Armor-Piercing''', abbreviated as '''M634 X-HP-SAP''' or '''M634 9.5×40mm HP-SAP''', and also known as the '''9.5×40mm KURZ''',<ref name="art3">'''[[The Art of Halo 3]]''', ''page 57''</ref>{{Ref/Note|''Kurz'' is a German word for "short".}} is a 9.5×40mm rifle cartridge made specifically for the BR55, the BR75,{{Ref/Book|Id=EN|Enc22|Page=168}} and the BR85 series.<ref name="waypoint">[https://www.halowaypoint.com/en-us/universe/weapons/battle-rifle '''Halo Waypoint''': ''Battle Rifle'']</ref>

==Overview==
The M634 X-HP-SAP was developed in conjunction with the prototype [[XBR55 Battle Rifle]]. As an experimental round, its use is only limited to the [[BR55 Battle Rifle]], the [[BR55 Heavy Barrel Service Rifle]], the [[BR75|BR75 Battle Rifle]], and the [[BR85 Heavy Barrel Service Rifle]]. While the round was designated as experimental around [[2525]], at some point between then and [[2558]], the "experimental" designation was dropped, becoming the M634 9.5×40mm HP-SAP.{{Ref/Reuse|waypoint}}

==Properties==
As designated in its name, the M634 X-HP-SAP is an experimental round. It uses a special propellant that allows it to achieve a higher muzzle velocity than the M118 7.62×51mm round while using a smaller cartridge. It is also semi-armor-piercing, meaning that it mixes the properties of an [[armor piercing round]] with the properties of another type of round. The second type is unknown, though it is most likely similar to the [[M225 SAP-HE]] used in the [[M6 Series]].

Unlike most ammunition types in the Halo games, this is not a real-life ammo type, the closest comparison being the [[wikipedia:9×39mm|9×39mm]] special purpose round, also known as the “Kurz.” Designed in the Soviet Union, this round was designed to defeat lighter body armours, while being subsonic to maximize stealth potential; it appears most real-life weapons firing the bullet have ''integrated'' silencers. However, the M634 does not appear to be subsonic, as it produces a super-sonic “crack” or “whip” when fired, and is instead intended for high-velocity and long-range marksmanship. 

==Gallery==
<gallery>
File:H2A 9.5x40mm in Mag.jpg|thumb|A 9.5×40mm cartridge in a magazine used to feed the [[BR55 Service Rifle|BR55 service rifle]] in ''[[Halo 2: Anniversary]]'' multiplayer.
File:H2A BR55 Spent Brass.jpg|thumb|Spent 9.5×40mm casings ejecting from a [[BR55]] in ''Halo 2: Anniversary'' multiplayer.
</gallery>

==List of appearances==
*''[[Halo: First Strike]]'' {{1st}}
*''[[Halo 2]]''
*''[[Halo 3]]''
*''[[Halo: Evolutions - Essential Tales of the Halo Universe]]''
*''[[Halo 4]]''
**''[[Spartan Ops]]''
*''[[Halo: Spartan Assault]]''
*''[[Halo: Escalation]]''
*''[[Halo 2: Anniversary]]''
*''[[Halo 5: Guardians]]''
*''[[Halo Infinite]]''
==Notes==
{{Ref/Notes}}

==Sources==
{{Ref/Sources}}

{{Ammunition}}