Weapon Name- M5 Seburo - 5.45mm
Round Type- 5.45mm x 33mm
Over-all length- 9 inches
Barrel length- 4.5 inches
Weight- 2.5 lb
Rate of Fire- 600 RPM
Feed Mechanism- Detachable box magazine
Round Capacity- 20 rounds, 30 rounds
Effective Range- 100 meters
Range- 300 meters
Accuracy- 3 MOA
Accessories- Picatinny Rails
Quick switch firing mechanism- N/A
Scope/Sights- Picatinny Rails
Muzzle Velocity- 715 m/s, 4.1 grams (1050 joules)
Firing System- Long stroke gas piston
Miscellaneous/electronic information- The M5 Seburo is a 5.45mm x 33mm handgun designed to pierce light armor from a handgun, based on the IWI Desert eagle firing system and using an HK45 recoil buffer.
Basic Information
The M5 Seburo is a 5.45mm x 33mm handgun designed to pierce light armor from a handgun, based on the IWI Desert eagle firing system and using an HK45 recoil buffer. The 5.45mm Carbine cartridge is designed to use higher pressure, faster burning propellants that allow it to achieve higher velocities from a shorter barrel, but is still far less than it would be from a longer barrel, at 1700 joules vs. approximately 1000 joules. The firearm resembles a CZ-75 or a Jericho 941 (which is based on the CZ-75), as it is based on the Desert Eagle, which is itself based on the CZ-75. The firearm is designed to be large and heavy to help absorb the recoil of the more powerful cartridge, but also has a dual spring recoil buffer, muzzle break, and extremely low friction coating which makes the action substantially smoother, thus reducing the peak recoil impulse of the firearm. In combination with this is a recoil buffer like in the HK45 and a firing system more reminiscent of rifles, without a reciprocating barrel, which further reduces the recoil, making such a powerful cartridge more manageable to shoot rapidly. At 1.6 inches the cartridge has the same length of a .357 magnum, .44 magnum, and 5.7mm x 28mm, but is still slightly longer than other handgun cartridges like the 9mm or .45 ACP.
Like the Desert Eagle, the M5 Seburo uses a gas-operated mechanism normally found in rifles, as opposed to the short recoil or blow-back designs most commonly seen in semi-automatic pistols. The system help to reduce recoil and work with higher pressure cartridges, which allows it to fire a more powerful cartridge. When a round is fired, gases are ported out through a small hole in the barrel near the breech. These travel forward through a small tube under the barrel, to a cylinder near the front of the barrel. The slide which acts as the bolt carrier has a small piston on the front that fits into this cylinder. When the gases reach the cylinder they push the piston rearward. The slide rides rearward on two rails on either side of the barrel, both with action springs around them, with a large pin inside the camming surface in the rear of the bolt that causes the bolt to rotate and unlock. A cylindrical mechanism on the left side of the bolt, called the bolt stabilizer assembly, prevents the bolt from rotating freely as the slide moves, enabling it to align correctly with the barrel again as the slide moves it forward. The spring loaded ejector pin is continually being depressed by the case, until the case is free of the chamber and releases tension from the ejector, causing the case to fly out, becoming released from the extractor claw in the process. The slide reaches its rear-most travel, then rides forward again under tension of the springs around the slide rails, the bottom lug of the bolt pushes a new round into the chamber, then the bolt locks up and the gun can be fired again once the trigger is released. The rotating bolt has four radial locking lugs, with the extractor on the right hand side fitting where the fifth lug would be, and strongly resembles the 7-lug bolt of the M16 series of rifles, while the fixed gas cylinder/moving piston resemble those of the Ruger Mini-14 carbine (the original patent used a captive piston similar to the M14 rifle). The design reduces felt recoil over recoil operated systems by using the expanding gases of the propellant to help cycle the action, reducing the reliance only on raw recoil force alone. There is also reduced mass due to the barrel being fixed in position, and a delaying mechanism due to the rotating bolt.
