Stargate SG1 The Alliance has a wide range of weaponry available. Here you will find some of the available weaponry at your disposal. More will be added as we have information on them.

• Beretta 92: Semi-Automatic, durable and precise handgun, used by many authorities and strike forces around the world.
  Caliber: 9x19mm Luger/Para; also .40SW in Mod.96 and 9x21mm IMI in mod.98
  Action: Double action
  Overall Length: 217 mm (197 mm Compact versions)
  Barrel Length: 125 mm (109 mm Compact versions)
  Weight Unloaded: 950-975 gramms, depending on model
  Capacity: 15 rounds (all 92 and 98 models except compact); 13 rounds (92 Compact); 11 rounds (mod.96 in .40SW); 8 rounds (92 Compact type M)
  The Beretta 92 pistols were developed by the Italian company Armi Pietro Beretta Spa. The original pistol, Beretta 92, entered production in 1976 and was based on early an Beretta model made in 1951. Model 92 was adopted by the Italian army and also manufactured under licence in Egypt.
  The Beretta 92 is a blowback operated, locked breech semi-automatic pistol. It features Walther P38 style, vertically tilting locking block system and external trigger bar, located at the right side of the frame (also Walter P38 style). Beretta 92 had double action trigger with frame mounted safety. The extractor also worked as a loaded chamber indicator. The frame is made from aluminium alloy, the slide is made from steel. The magazine release button is located at the bottom of the grip. The grip panels were made from the wood. The front sight is of a fixed blade type, while the rear sight is dovetailed.
• SPAS 12 Shotgun: Law enforcement troops rely on the high kinetic energy delivered in close-combat use of this high-tech shotgun. If the enemy is close enough, this weapon will stop him for good.
  Type: selective pump-action or gas-operated
  Gauge: 12
  Chamber: 2 3/4" (70 mm)
  Length: 1041 mm
  Barrel length: 546 mm.
  Weight 4.4 kg
  Capacity: 8 rounds in underbarrel tube magazine
  The SPAS-12 was designed in the late 1970s by the Italian company Luigi Franchi Spa as a special purpose, military and police close combat weapon (actually, SPAS stands for Sporting Purpose Automatic Shotgun, or Special Purpose Automatic Shotgun, depending on the source). It featured a selective action for greater versatility, and can be used as a gas operated semi-automatic repeater or as a manually operated pump action repeater, depending on the mission and ammunition used. Since its introduction the SPAS-12 became a very popular police and special forces weapon, being versatile, reliable and with good firepower.
  SPAS-12 utilises a somewhat traditional for shotguns gas system with annular gas piston locating around the underbarrel magazine tube. It operates the bolt with a vertically tilting locking lug that engages the barrel extension to lock. SPAS-12 can be switched between gas operated self-loading mode and manually operated pump mode by pressing and holding a button at the bottom of the forearm and pulling the forearm slightly forward for AUTOMATIC mode or backward for PUMP (or MANUAL) mode. Earlier models of the SPAS-12 had the lever type safety at the front of the triggerguard, but due to some deficiencies this was latter replaced by the push-button (cross-bolt) safety at the same place.
  The SPAS-12 could be fitted with stamped metallic buttstock that folds to the top of the receiver when not in use, as well as a pistol grip made of plastic. Alternatively, solid plastic buttstocks with pistol grips are available. The barrel has a cylinder bore with screw-on muzzle devices (cokes of flash hiders). Sights usually are of rifle type, with post front and open notch rear sight.
• STINGER Rocket Launcher: The stinger only holds one rocket at a time and has to be reloaded each time after it's fired.
  The FIM-92A (Stinger) is fired by one man through a shoulder launcher. Once a target is located and identified as a threat, the operator has to activate the missile. This process takes about 6 seconds, and includes IR seeker cooling, gyro spin-up, and activation of the electronics. When the detector logic has locked on an IR source, a buzzer signal is sent to the operator, who may then pull the trigger. 1.7 seconds later, the FIM-92 missile is launched. After the Stinger has been ejected from the launcher by a very short duration boost motor, the forward control fins and fixed tailfins extend. After a short coasting period to take the missile to a safe distance from the operator, the two-stage (boost/sustain) solid-fueled main motor ignites. The initial boost phase accelerates the Stinger to Mach 2.2 within only 2 seconds, and top-speed at motor burnout can be as high as Mach 2.6 for certain trajactories. If no target is hit after about 17 (± 2) seconds, the missile self-destructs.
  The Stinger has two major advantages over the older FIM-43 Redeye. The first is the second-generation cooled conical-scan IR seeker, which offers all-aspect detection and homing capability. Therefore, the Stinger can be used on approaching aircraft, before these had a chance to drop their short-range ordnance or begin ground-strafing. The second new feature of Stinger is its integrated AN/PPX-1 IFF system, which is an obvious advantage in a scenario where both friendly and enemy forces are operating aircraft. In flight, the missile's seeker head and guidance electronics can follow a target manoeuvering at more than 8g. In the immediate vicinity of the target, the guidance logic will be biased so that the missile homes on a particularly vulnerable part of the target (e.g. the cockpit of an aircraft, instead of the center of its IR signature, the jet exhaust). The 3 kg blast-fragmentation warhead is triggered by a proximity and time-delayed impact fuze. Minimum effective range is quoted as 200 m.
• MINIGUN: Thousands of bullets in a few seconds, flying against your enemy with mach 2 and more; The minigun is the most impressive product of non-alien weapon manufacturing.
  The XM214 Automatic Gun (aka the Minigun) was developed for use mounted in and on helicopters and light aircraft. Like most G.E. Gatling gun type weapons it has six rotating barrels and the potential for an absolutely incredibly high rate of fire. It is electrically driven, and has a firing rate that can be adjusted from 1000 rpm all the way up to 10,000 rpm. In addition, it can be set to fire bursts from 30 to 1000 rounds. A real drawback to the higher rates of fire is the huge ammunition usage (166 shots per second) , and the power requirements, because firing it at full power it requires some 3.2 hp to drive the barrel assembly.
• P90: Standard SG Team issue.
  Caliber: 5.7x28mm SS190
  Weight: 2.54 kg empty; 3 kg loaded with magazine with 50 rounds
  Lenght: 500 mm
  Barrel lenght: 263 mm
  Rate of fire: 900 rounds per minute
  Magazine capacity: 50 rounds
  Effective range: 200 meters
  The FN P90 submachine gun (SMG) was developed in the late 1980s as a defensive weapon for the troops whose primary activities does not include small arms - vehicle and tank crew members, artillery crews etc. Standart pistols and SMGs chambered for pistol rounds were proved ineffective against enemy soldiers, wearing armour (bulletproof) vests, so FN Herstal developed a new round with enhanced penetration - the SS190. This round looks like scaled downt 5.56mm NATO round and forces the pointed, steel core bullet to the 600-700 meters per second at the muzzle, thus being capable to defeat standart CRISAT helmets and armour vests at reasonable distances (50-100 meters).
  The P90 is a blowback operated, selective fire weapon. It is fed from 50-rounds box magazines, made from transluscent polymer. The magazine is located above the barrel, with the cartridges being aligned at 90 degrees to the barrel axis. Each magazine has built-in ramp that rotates cartridge to align it with the barrel prior to chambering it.
  The P90 controls are completely ambidextrous, with charging handles located at both sides of the weapon, and the safety/fire mode selector is located below the trigger. The P90 also features downward ejection of the spent cases. P90 is built in a bull-pup configuration, with polymer stock, and features built-in reflex collimator sight with 1X magnification and reticle automaticaly ajustable to the light level, as well as a set of the backup open sights. The P90 may be equipped with special silencer, that should be used with a special, sub-sonic variant of the 5.7x28mm cartridge.
  The P90 may be referred as a forerunner of the PDW (Personal Defence Weapon) concept, that has arisen in last 4 or 5 years.
  

Sources for the information listed above: Modern Firearms & Ammunition and The Netbook of Modern Firearms

The chart below is an old layout as given by the developers of Stargate SG1: The Alliance to indicate the relative strength between some of the available weapons usable in the game. Please don't hold this chart as the final reference. It was done a long time go as an indication of weapon strength, as such it is likely to be out of date. Having said that it is interesting none-the-less to see how some of the weapons will perform in comparison to each other.