Doomingsland
08-05-2006, 22:51
DAC-97 Submachine Gun
http://img.photobucket.com/albums/v383/Doomingsland/dac9727ln1.png
Design History and Overview
The DAC-91 submachine gun has honorably served the Empire for several decades, as well as the armed forces of dozens of other nations, and remains a popular export weapon. It has achieved fame in both the criminal and law enforcement community as an extremely lethal but compact weapon system, capable of punching through body armor with ease. With the entrance of the DR-83 tactical rifle into Imperial service and the adoption of a new policy on small arms, however, the DAC-91 inevitably recieved the axe from the High Command.
Because the DAC-91, like the DR-31 that the DR-83 replaced, was electronically operated, it required a battery to fire. This did not sit well with many because it added a new liability to the weapon. The DR-83 21st Century Tactical Rifle did away with this complex design, opting for superior reliability. This weapon served as the platform for what would be the next generation of Imperial small arms. The first variant of the DR-83 was the DMG-83 light machinegun, which was simply a belt-fed, heavy barreled version of the DR-83 fitted with a bipod, serving as the standard squad automatic weapon of the Empire.
The second variant was DDI's replacement for the DAC-91, the DAC-97 This version features the same operating system as the DR-83 and extremely similar internals, yet it is noticibly different. The DAC-97, unlike the more conventional DR-83, features a bullpup configuration in order to provide a more compact overall package. It has been superbly streamlined towards its role as a compact weapon for tankers, helicopter and aircraft crew, and special forces and counter-terrorist units. In essense, Doomingsland Defense Industries has done for the DR-83 what Heckler and Koch did for the G-3: They made an "MP-5" for the DR-83.
Overall Design
When examining the DAC-97, one first notices its blatant bullpup configuration. In a bullpup, the action is located behind the grip of the weapon, allowing for a longer barrel in a smaller overall package. This allows for a superbly maneuverable weapon for close quarters fighting, while granting it superb accuracy at greater range. The 16" barrel itself is free floating, allowing for even greater accuracy. The barrel itself is threaded, allowing for numerous different attachments, such as sound suppresors, flash suppresors, and muzzle brakes. Each out-of-the-box DAC-97-II comes issued with a flash suppresor, as prefered by the Imperial Army, although suppresors are often utilized by special units. The barrel is forged from 4150 chrome molybdenum steel and given a black finish, producing an excellent component.
The weapon's reciever is machined from a solid 4140 steel forging. While this method of manufacturing is more difficult, it produces a far more rugged, superior component. Tests by the Imperial Government on DAC-97 recievers found that they were capable of withstanding tremendous pressure. The trigger group is carefully machined and features an ultra-smooth pull, meaning that the shooter won't move the weapon nearly as much when squeezing off a round. This adds to the accuracy. Also aiding in accuracy is the use of a titanium hammer rather than a regular steel one.
In order to be more maneuverable at closer range, the weapon had to be relatively light, while still maintaining low recoil and overall strength. As a result, the weapon's furniture (handguard, pistol grip, ect.) are constructed of a strong, lightweight polymer, allowing for a tough weapon that is still lightweight. The actual vented handguard maintains an advanced integrated rail system. This consists of four rails: a top rail, which runs along the whole the the weapon, two side rails, allowing for the mounting of flashlights, and a bottom rail. This allows for numerous accesories to be added: a forward assualt grip are generally mounted on the bottom rail to allow for easier handling of the weapon, while flashlights and lasers are often mounted on the side rails. To reduce felt recoil, the DAC-97 has a special rubber butt pad with in-built springs, greatly reducing the recoil felt by the shooter. The butt of the weapon is adjustable for length, allowing for the shooter to adjust the weapon for comfort. This is also helpful when the shooter is wearing armor.
In regards to sighting systems, the DAC-97's own iron sights are quite superb. Utilizing the same tritium sights, good for both day and night combat, used by the DR-83, these sights feature rear peep sights and front post sights, allowing for quick and easy range and wingadge adjustment . These sights feature an MOA of 1.25.
http://img.photobucket.com/albums/v383/Doomingsland/loldoomiesightsxq51.png
The weapon's operation allows for the greatest possible reliability. Using a short-stroke gas piston based on the DR-83 action, the weapon produces superb results in the area of reliability (tests by the Imperial Government put 10,000 rounds through the weapon without a single failure). Unlike most rifles, this configuration is not reliant on a tight fit with the bolt group. Rather, it uses rails along with its recoil spring guide rod and short stroke piston to help keep the carrier in line, while leaving ample room for debris to fall. The DR-83's recoil reduction system is also utilized, reducing the hitting of metal against metal in the operation of the bolt.
One of the main complaints about bullpup weapons is the fact they aren't quite ambidexterous. Doomingsland Defense Industries understood this. They also understood that not all corners are right-handed, and that on the battlefield soldiers may have to switch the shoulder they're firing from. As a result, the DAC-97 features an ambidexterous forward ejection system, allowing for easier use for left handed shooters.
Stripping down the weapon is incredibly simple: one needs only to remove the dust cover, withdraw the recoil spring, and pull out the bolt and piston to field strip the DAC-97. This process is virtualy identical to stripping the DR-83.
The magazine cache is similar to most other shoulder arms, requiring the magazine to be rocked into position in order to lock in. The magazine used by the DAC-97 is another important feature. This is a large capacity cylindrical magazine, making use of a helical arrangement. This same arrangement was used on the DAC-97's predeccessor, the DAC-91. It has proven to be extremely popular for its extra capacity, and thus has been maintained with the DAC-97. The magazine works by having helical grooves along the inside of the magazine, forcing the bullets to follow the grooves. Running along the grooves is a follower pushed by a spring, forcing the rounds along the track and feeding the weapon. This magazine is constructed of steel and is very durable, as required by the High Command.
The selector switch is located on the left side of the weapon above the pistol grip. This allows for extreme ease of access, allowing the shooter to switch rate of fire with the flick of the thumb, without taking his hand off of the pistol grip. The switch has four settings: 'SAFE', 'SEMI', 'BURST, and 'AUTO'. The weapon's burst function is a three-round burst, allowing for greater accuracy.
Cartridge
The original DAC-97 fired the 10.5x33mm cartridge. This ancient round had been in service with the Imperial military for over one hundred years, and thus its replacement was assured. Reasons for this were simple: recoil. The 10.5x33mm produced a rather high amount of recoil, and thus it was replaced by the .40 Doomingsland Defense Industries cartridge (10x23mm bottlenecked), initialy manifesting in the TDX semi-automatic pistol, which replaced all revolvers in Imperial service, and now in the DAC-97.
This round has very similar killing power to the mighty 10mm Auto cartridge in a more compact and reliable bottlenecked form. While it has a shorter casing, the casing is wider, allowing for just as much powder to be packed in.
The bottlenecked design also is very beneficial for feeding, as bottlenecked cartridges are superior to straightwalled cartridges in this aspect. The round boasts both flat trajectory shooting and superior knockdown power: a heavy round moving at a high velocity. This is a deadly combination that results in knockdown power vastly superior to that of the famed .45 ACP cartridge.
DDI has developed several loads for this cartridge. There is a 230 grain full metal jacket (FMJ) cartridge for superior penetration of cover and all around utility. A 215 grain jacketed hollowpoint (JHP) round designed for maximum expansion in a target is also in service, boasting superior killing power but inferior penetration to the FMJ round. Several other loads, including a frangible load, are available as well. However, the primary round used by the military is the Armor Piercing Fragmenting Jacket cartridge.
DDI, of course, has recognized that not all targets (if not most) are unarmored. As a result, a special round was developed to deal with both armored. This 165 grain round, called the Armor Piercing Fragmenting Jacket (APFJ), is capable of both penetrating a Level IIIA Kevlar vest, and cause a grevious wound on an unarmored target. This round consists of a pointed tungsten nose and core section immersed in a blended metal jacket that flattens out upon impact with a hardened surface, or an object unable to be penetrated (such as a vest). When this happens, the tungsten core is able to continue through, piercing the armor.
With unarmored targets, the case expands as the round penetrates. This both creates a massive wound from the fragments, and causes the core to begin to tumble within the target, creating an extremely lethal and difficult to treat wound. The lighter 165 grain load boasts both lower recoil and higher velocity, allowing for superior armor penetration properties.
The .40 Caliber DDI cartridge is an inherently accurate, as well. This is also a highly streamlined cartridge with a flat trajectory, meaning that the round's flight path will remain the same for most of the projected engagement range. A shooter will spend less time figuring out how much higher they have to aim given a range and be able to fire much more quickly and accurately.
Accuracy Results
*At 25 meters with standard Imperial issue 10x23mm APFJ ammunition, results reflect a three-shot shot fully burst of fully automatic fire from the offhand position
Average Velocity- 1,987 feet per second
Best group- 2.54"
Worst group- 3.15"
Average group- 2.78"
Specifications
Caliber- .40 Doomingsland Defense Industries (10x23mm)
Muzzle Velocity- 2,050 FPS
Operation- Short stroke gas piston, rotating bolt, counter piston
Barrel Length- 16 inches
Overall Length- 27 inches (butt fully extended)
Weight- 5.8lbs empty
Magazine Capacity- 55+1 rounds
Effective Range- 350 meters
Rate of Fire- Adjustable gas valve for 800, 900, and 1,000 Rounds per Minute
Fire Modes- Semi, 3-round Burst, Auto
Cost Per Unit (Export)- $1,500
OOC:Pic done by MassPwnage.
http://img.photobucket.com/albums/v383/Doomingsland/dac9727ln1.png
Design History and Overview
The DAC-91 submachine gun has honorably served the Empire for several decades, as well as the armed forces of dozens of other nations, and remains a popular export weapon. It has achieved fame in both the criminal and law enforcement community as an extremely lethal but compact weapon system, capable of punching through body armor with ease. With the entrance of the DR-83 tactical rifle into Imperial service and the adoption of a new policy on small arms, however, the DAC-91 inevitably recieved the axe from the High Command.
Because the DAC-91, like the DR-31 that the DR-83 replaced, was electronically operated, it required a battery to fire. This did not sit well with many because it added a new liability to the weapon. The DR-83 21st Century Tactical Rifle did away with this complex design, opting for superior reliability. This weapon served as the platform for what would be the next generation of Imperial small arms. The first variant of the DR-83 was the DMG-83 light machinegun, which was simply a belt-fed, heavy barreled version of the DR-83 fitted with a bipod, serving as the standard squad automatic weapon of the Empire.
The second variant was DDI's replacement for the DAC-91, the DAC-97 This version features the same operating system as the DR-83 and extremely similar internals, yet it is noticibly different. The DAC-97, unlike the more conventional DR-83, features a bullpup configuration in order to provide a more compact overall package. It has been superbly streamlined towards its role as a compact weapon for tankers, helicopter and aircraft crew, and special forces and counter-terrorist units. In essense, Doomingsland Defense Industries has done for the DR-83 what Heckler and Koch did for the G-3: They made an "MP-5" for the DR-83.
Overall Design
When examining the DAC-97, one first notices its blatant bullpup configuration. In a bullpup, the action is located behind the grip of the weapon, allowing for a longer barrel in a smaller overall package. This allows for a superbly maneuverable weapon for close quarters fighting, while granting it superb accuracy at greater range. The 16" barrel itself is free floating, allowing for even greater accuracy. The barrel itself is threaded, allowing for numerous different attachments, such as sound suppresors, flash suppresors, and muzzle brakes. Each out-of-the-box DAC-97-II comes issued with a flash suppresor, as prefered by the Imperial Army, although suppresors are often utilized by special units. The barrel is forged from 4150 chrome molybdenum steel and given a black finish, producing an excellent component.
The weapon's reciever is machined from a solid 4140 steel forging. While this method of manufacturing is more difficult, it produces a far more rugged, superior component. Tests by the Imperial Government on DAC-97 recievers found that they were capable of withstanding tremendous pressure. The trigger group is carefully machined and features an ultra-smooth pull, meaning that the shooter won't move the weapon nearly as much when squeezing off a round. This adds to the accuracy. Also aiding in accuracy is the use of a titanium hammer rather than a regular steel one.
In order to be more maneuverable at closer range, the weapon had to be relatively light, while still maintaining low recoil and overall strength. As a result, the weapon's furniture (handguard, pistol grip, ect.) are constructed of a strong, lightweight polymer, allowing for a tough weapon that is still lightweight. The actual vented handguard maintains an advanced integrated rail system. This consists of four rails: a top rail, which runs along the whole the the weapon, two side rails, allowing for the mounting of flashlights, and a bottom rail. This allows for numerous accesories to be added: a forward assualt grip are generally mounted on the bottom rail to allow for easier handling of the weapon, while flashlights and lasers are often mounted on the side rails. To reduce felt recoil, the DAC-97 has a special rubber butt pad with in-built springs, greatly reducing the recoil felt by the shooter. The butt of the weapon is adjustable for length, allowing for the shooter to adjust the weapon for comfort. This is also helpful when the shooter is wearing armor.
In regards to sighting systems, the DAC-97's own iron sights are quite superb. Utilizing the same tritium sights, good for both day and night combat, used by the DR-83, these sights feature rear peep sights and front post sights, allowing for quick and easy range and wingadge adjustment . These sights feature an MOA of 1.25.
http://img.photobucket.com/albums/v383/Doomingsland/loldoomiesightsxq51.png
The weapon's operation allows for the greatest possible reliability. Using a short-stroke gas piston based on the DR-83 action, the weapon produces superb results in the area of reliability (tests by the Imperial Government put 10,000 rounds through the weapon without a single failure). Unlike most rifles, this configuration is not reliant on a tight fit with the bolt group. Rather, it uses rails along with its recoil spring guide rod and short stroke piston to help keep the carrier in line, while leaving ample room for debris to fall. The DR-83's recoil reduction system is also utilized, reducing the hitting of metal against metal in the operation of the bolt.
One of the main complaints about bullpup weapons is the fact they aren't quite ambidexterous. Doomingsland Defense Industries understood this. They also understood that not all corners are right-handed, and that on the battlefield soldiers may have to switch the shoulder they're firing from. As a result, the DAC-97 features an ambidexterous forward ejection system, allowing for easier use for left handed shooters.
Stripping down the weapon is incredibly simple: one needs only to remove the dust cover, withdraw the recoil spring, and pull out the bolt and piston to field strip the DAC-97. This process is virtualy identical to stripping the DR-83.
The magazine cache is similar to most other shoulder arms, requiring the magazine to be rocked into position in order to lock in. The magazine used by the DAC-97 is another important feature. This is a large capacity cylindrical magazine, making use of a helical arrangement. This same arrangement was used on the DAC-97's predeccessor, the DAC-91. It has proven to be extremely popular for its extra capacity, and thus has been maintained with the DAC-97. The magazine works by having helical grooves along the inside of the magazine, forcing the bullets to follow the grooves. Running along the grooves is a follower pushed by a spring, forcing the rounds along the track and feeding the weapon. This magazine is constructed of steel and is very durable, as required by the High Command.
The selector switch is located on the left side of the weapon above the pistol grip. This allows for extreme ease of access, allowing the shooter to switch rate of fire with the flick of the thumb, without taking his hand off of the pistol grip. The switch has four settings: 'SAFE', 'SEMI', 'BURST, and 'AUTO'. The weapon's burst function is a three-round burst, allowing for greater accuracy.
Cartridge
The original DAC-97 fired the 10.5x33mm cartridge. This ancient round had been in service with the Imperial military for over one hundred years, and thus its replacement was assured. Reasons for this were simple: recoil. The 10.5x33mm produced a rather high amount of recoil, and thus it was replaced by the .40 Doomingsland Defense Industries cartridge (10x23mm bottlenecked), initialy manifesting in the TDX semi-automatic pistol, which replaced all revolvers in Imperial service, and now in the DAC-97.
This round has very similar killing power to the mighty 10mm Auto cartridge in a more compact and reliable bottlenecked form. While it has a shorter casing, the casing is wider, allowing for just as much powder to be packed in.
The bottlenecked design also is very beneficial for feeding, as bottlenecked cartridges are superior to straightwalled cartridges in this aspect. The round boasts both flat trajectory shooting and superior knockdown power: a heavy round moving at a high velocity. This is a deadly combination that results in knockdown power vastly superior to that of the famed .45 ACP cartridge.
DDI has developed several loads for this cartridge. There is a 230 grain full metal jacket (FMJ) cartridge for superior penetration of cover and all around utility. A 215 grain jacketed hollowpoint (JHP) round designed for maximum expansion in a target is also in service, boasting superior killing power but inferior penetration to the FMJ round. Several other loads, including a frangible load, are available as well. However, the primary round used by the military is the Armor Piercing Fragmenting Jacket cartridge.
DDI, of course, has recognized that not all targets (if not most) are unarmored. As a result, a special round was developed to deal with both armored. This 165 grain round, called the Armor Piercing Fragmenting Jacket (APFJ), is capable of both penetrating a Level IIIA Kevlar vest, and cause a grevious wound on an unarmored target. This round consists of a pointed tungsten nose and core section immersed in a blended metal jacket that flattens out upon impact with a hardened surface, or an object unable to be penetrated (such as a vest). When this happens, the tungsten core is able to continue through, piercing the armor.
With unarmored targets, the case expands as the round penetrates. This both creates a massive wound from the fragments, and causes the core to begin to tumble within the target, creating an extremely lethal and difficult to treat wound. The lighter 165 grain load boasts both lower recoil and higher velocity, allowing for superior armor penetration properties.
The .40 Caliber DDI cartridge is an inherently accurate, as well. This is also a highly streamlined cartridge with a flat trajectory, meaning that the round's flight path will remain the same for most of the projected engagement range. A shooter will spend less time figuring out how much higher they have to aim given a range and be able to fire much more quickly and accurately.
Accuracy Results
*At 25 meters with standard Imperial issue 10x23mm APFJ ammunition, results reflect a three-shot shot fully burst of fully automatic fire from the offhand position
Average Velocity- 1,987 feet per second
Best group- 2.54"
Worst group- 3.15"
Average group- 2.78"
Specifications
Caliber- .40 Doomingsland Defense Industries (10x23mm)
Muzzle Velocity- 2,050 FPS
Operation- Short stroke gas piston, rotating bolt, counter piston
Barrel Length- 16 inches
Overall Length- 27 inches (butt fully extended)
Weight- 5.8lbs empty
Magazine Capacity- 55+1 rounds
Effective Range- 350 meters
Rate of Fire- Adjustable gas valve for 800, 900, and 1,000 Rounds per Minute
Fire Modes- Semi, 3-round Burst, Auto
Cost Per Unit (Export)- $1,500
OOC:Pic done by MassPwnage.