9mm AR Upper

The 9mm AR Upper 

Have you ever favored your AR15 so much that you desired something similar, but to a more controllable and compact pistol caliber widely known around the world, such as a 9mm? If so, then the answer to your question is the AR9, which is an AR platform rifle or pistol that is designed to shoot the 9mm cartridge. The 9mm AR was originally designed by Colt to counter the import of 9mm sub-guns into the US market. The Colt 5.56mm rifle was modified so that it could use 9mm handgun rounds, and this modification was kept to an absolute minimum in order to speed up development. Making small adjustments to an existing design with existing parts is a great approach to reducing manufacturing costs, but it does need certain design concessions.

A 9mm round or Luger 9mm may be fired from an AR9, which is an AR-style rifle with a special chamber. Distinctions emerge when one departs from the standard.223/5.56 NATO chambering. The AR9 has been designed around components that are exclusive to its caliber and design: mainly the barrel and other major components such as the BCG (Bolt Carrier Group). Because it is delivering a handgun load through a heavier and more controllable frame, the AR9 has almost no felt recoil. You won't develop a sore shoulder from taking a lifetime to practice your follow-up shots, and you won't even get tired of shooting. There is less felt recoil than with the AR-15 due to the blowback system. The AR9 usually comes in two configurations: a pistol and a rifle. AR9 pistols are much smaller in length compared to rifles. 

The 9mm cartridge has very different operating dynamics than the 5.56mm NATO cartridge. There is a greater cyclic rate due to the quicker burning of pistol powder, so it is necessary to reduce it. A blowback mechanism for the closed bolt was selected. In order to securely remove and eject the spent cartridge case after the trigger has been pulled and the firing pin has been struck, the breech must remain closed against the combined forces of the action spring, hammer spring, and bolt. The steel buffer consists of two halves with three rubber disks in the space between them.

The size of an AR9 is up to the builder or assembler, but a standard 7.5" to 12" barrel and pistol brace are employed. The AR9 is the ideal length and size for home or personal defense because of the combination of these two components. In addition to its lighter ammo and shorter barrel, the AR9's lighter lower receiver also makes it a more portable option than the AR15. Unless you're shooting .22LR, 9mm is the most cost-effective caliber. The AR9 is more affordable overall, and it has a wide variety of ammunition types to choose from for self-defense. The 9mm bullet is quite accurate up to 100 yards, but it rapidly loses velocity and accuracy after that. The AR9's obvious drawbacks are its short range and increased bullet drop. 

Although the AR9 shoots a pistol cartridge, one major advantage over the regular AR15 - 5.56 NATO caliber is that it can be suppressed more effectively, with significant decreases in sound decibels. Running a quality suppressor on the AR9 has dominating advantages over suppressing the AR15 or other calibers. 

If you want to build or customize your own AR9, then check our inventory at Gorilla Machining for a wide selection of AR9 necessary parts and components.

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