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NOTICE (CA AB 1263 compliance): It is generally a crime in California to engage in any of the following conduct without a valid license to manufacture firearms: (A) Manufacturing more than three firearms per calendar year in California. (B) Manufacturing a firearm using a three-dimensional printer or CNC milling machine. (C) Manufacturing a firearm for the purpose of selling or transferring ownership of that firearm to another individual who is not licensed to manufacture firearms. (D) Manufacturing a firearm for the purpose of selling, loaning, or transferring that firearm, with the intent to complete the sale, loan, or transfer without a required background check initiated by a licensed firearms dealer. (E) Allowing, facilitating, aiding, or abetting the manufacture of a firearm by a person who is legally prohibited from possessing firearms. (F) Manufacturing, or causing the manufacture of, assault weapons, machineguns, undetectable firearms, unserialized firearms, unsafe handguns that are not on the Department of Justice roster of handguns certified for sale in California, or other generally prohibited weapons.
BCM® M4 Upper Receiver Assembly (w/ Laser T-Markings)
Built to the correct Mil-Specs
(Inside Diameter for barrel extension slightly undersized for a tighter fit to the barrel and a more accurate rifle. Please use a heat gun or hair dryer to warm up threaded bore of receiver if barrel extension is too tight.)
- Precision machined to correct Mil-Specs from 7075 T6 Forgings extension, providing the user with superior strength when dropped or when mortaring malfunction clearance drills.
- Fully Assembled with forward assist, and ejection port cover
- Mil-Std 1913 Rail for mounting optics and accessories
- Machined for use with barrels that use an M4 barrel extension
- Laser etched T-markings for addressing the remounting of optics
- Includes Mil-Spec Forward Assist with heat treated tool steel pawl, with press fit and pinned cap
- Hard Coat Anodized per Mil-A-8625F, Type III, Class2
- Dry Film Lube on interior bore per Mil-Specs
- As with all BCM® products, Made in the U.S.A.
***This product contains chemicals/materials known to the State of California to cause cancer and other reproductive harm. To learn more, visit www.p65warnings.ca.gov.***
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WARNING: Discharging firearms in poorly ventilated areas, cleaning firearms or handling ammunition or components may expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm, including: Lead, Hexane, Isopropyl Alcohol, Ammonium Hydroxide, Ethyl Alcohol, Kerosene, Oleic acid, and other substances, from direct contact and inhalation. Have adequate ventilation at all times. Wash hands thoroughly after exposure. For more information go to www.P65Warnings.ca.gov
