The barrel ships with gas block. This barrel is designed for our gas block that is 1 inches long (included). A standard front sight base is 1.9 inches long and will not fit. Barrel installation should be performed by a qualified gunsmith. Installation of the gas block dowel pin and gas block is required to complete the assembly process.

Features:

Stainless barrel - 1:7 inches twist improved polygonal rifling with 556 Noveske Match Chamber
Extended feed ramps
Gas tube
Pinned low profile gas block, 0.75
1/2 X 28 threads - aside from the 20 inches
Medium contour

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All NFA Rules Apply

These items are controlled by the U.S. Government and authorized for export only to the country of ultimate destination for use by the ultimate consignee or end-user(s) herein identified. They may not be resold, transferred, or otherwise disposed of, to any other country or to any person other than the authorized ultimate consignee or end-user(s), either in their original form or after being incorporated into other items, without first obtaining approval from the U.S. government or as otherwise authorized by U.S. law and regulations.

WARNING: Handling firearms or firearms parts can expose you to lead and other petroleum products known to the State of California to cause cancer, birth defects, or other reproductive harm. Wash hands thoroughly after handling. For more information go to www.p65warnings.ca.gov (CA Health and Safety Code Section 25249.6).