This 4.5” barrel is a fully machined barrel precision-crafted from 4150 Chrome Moly Vanadium, rifled with a 1:10 twist and QPQ coated inside and out. The result is an accurate barrel that stays that way without chipping or peeling coatings and little risk of damage from corrosion, regardless of your operating environment.

**These barrels do not have index pins**

Length - 4.5"
Material - 4150 Chrome Moly Vanadium
Profile - Straight
Finish - QPQ Corrosion Resistant
Gas System Length - None
Gas Block Journal - N/A
Twist Rate - 1:10 inches
Muzzle - 1/2x36 Threaded
All NFA/ATF Rules Apply

Depending on your state and local laws, you could use this barrel with a lower receiver that is a Registered SBR, or Pistol. Possession of this barrel along with a Non-NFA lower receiver may be Prohibited. We are not lawyers and the above information is not legal advise. Make sure you understand the most up to date federal, state and local laws before proceeding with this product.

SKU: KM-9MM-4.5-ST-1-2X36
UPC: 860006522179