The Lead & Steel LS9MM4.5-36 is a 4.5-inch 9mm barrel for AR9 pistol caliber carbine and pistol builds. It has a nitride finish for wear and corrosion resistance and a 1/2x36 threaded muzzle for common 9mm muzzle devices. A straightforward barrel for building or rebarreling a 9mm AR.
- Brand: Lead & Steel
- Caliber: 9mm
- Length: 4.5 in
- Platform: AR9
- Finish: Nitride
- Thread pitch: 1/2x36
- Manufacturer part number: LS9MM4.5-36
