JE Machine AR-15 9mm 10.5" Barrel

A 10.5 inch 9mm barrel for the AR-15 platform from JE Machine.

Pistol caliber AR builds run a blowback action rather than a gas system, so barrel length here is a question of balance and handling more than anything else. At 10.5 inches the gun stays short and quick to move between targets, which is most of the reason people build 9mm ARs in the first place. Check your bolt, buffer and handguard length against the barrel before you order the rest of the parts around it.