| Platform | Mk4 |
| Caliber | .22 LR |
| Barrel Length | 16.1 |
| Barrel Twist | 1:16 |
| Barrel Contour | M4 |
| Barrel Material | 4140CM, SBN |
| Barrel Twist | 1:16 |
| Muzzle Thread | 1/2 X 28 |
| Gas Port Location | N/A |
| Gas Block | N/A |
| Finish | SBN |
| Weight | 1.67 lbs |
Expected to ship within 15-30 business days. AR Parts Notice - State/local restrictions may apply in CT, DC, IL, MA, NJ, NY, or WA. Customers must review our Shipping Policy prior to ordering.
Barrel and Collar Kit, 16.1" M4, 22LR
Perfect for building your custom dedicated 22LR AR15 upper group. Also Includes a barrel collar to replace the chamber adapter on your 22AR Conversion.