Caliber: 5.56 NATO
Barrel Length: 11.5"
Barrel Profile: Pencil
Barrel Steel: 4150 Chrome Moly Vanadium
Barrel Finish: Parkerized
Chrome Lining: Yes
Muzzle Thread Pattern: 1/2" x 28
Twist Rate: 1 in 7"
Barrel Extension: M4
Gas System Length: Carbine
Diameter at Gas Block: .625"
Gas Block Type: XM177E2 Front Sight Base
Muzzle Device: CAR style Flash hider with Grenade Ring
Receiver Material: Forged 7075-T6
Upper Receiver Type: M16A1 w/o feed ramps, Gray
Handguard Type: Carbine Premium 6 hole handguard
Bolt Material: Carpenter 158 Steel
Bolt Carrier Profile: Full Auto

Features

Harrington & Richardson present the complete XM177E2 11.5" Pistol/SBR upper. The H&R XM177E2 uses an M16A1 carry handle upper and 11.5" pencil profile barrel making this a light, handy clone upper perfect for commandos in the jungle, or general lightweight plinking.

Note: This flash hider is NOT permanently attached and the combination of this flash hider and barrel length does NOT equal 16". Upper for SBR/Pistol use only.

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Shipping Restrictions

It is the customer’s responsibility for understanding state laws regarding all purchases made. For a comprehensive list of all Shipping Restrictions, please refer to our Shipping Restrictions By State Page found Here.

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.

Local Law Compliance

Certain firearm parts and accessories, including AR-style upper receivers, are subject to complex and frequently changing federal, state, and local laws and regulations. While an upper receiver may be lawfully sold and shipped as a component, the legality of possessing, assembling, configuring, or using an upper receiver in certain states (e.g., California, Washington State) and localities depends on how it is assembled, combined with other components, and ultimately used. You are solely responsible for ensuring that any assembly, configuration, possession, or use complies with all federal, state, and local laws, including any so-called “assault weapon” bans and short-barreled rifle restrictions. We do not provide legal advice and are not responsible for unlawful configurations or uses.

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).