| Caliber | .22 LR |
| 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 |
| Weight | 2 lbs |
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Barrel and Bolt Group Kit, 16.1" M4, 22LR
Everything you need to convert your existing upper to a dedicated .22LR. Just purchase a magazine and you are ready to go. For best performance use a round style hammer as notched hammers can cause function issues and 36 grain plated nose bullets have proven to be the best choice for function.