Aero Precision M4E1 .300 BO ASSEMBL UPPR RCVR M4 16'' BBL PISTOL-LENGTH BLK APAR640251M14

From Aero Precision, the AR-15 M4E1 .300 Blackout Assembled Upper Receivers. Chambered in 300 Blackout, the upper is finished with black anodizing and available in three lengths, each with different length handguards. This upper does not come with the charging handle or bolt carrier group, allowing the user to personalize their upper receiver even more! The Aero Precision Assembled Upper Receiver also features:

• M-LOK EM-7 7” for 8” barrel, 9” handguard for 10” barrel, 15” handguard for 16” barrel
• 8”, 10”, and 16” carbine length chrome moly barrel
• Pistol length gas system w/ low profile gas block
• Standard A2 flash hider - not pinned or welded
• Bolt Carrier Group and Charging Handle are NOT included
• Made in the USA

The Aero Precision AR-15 8", 10", or 16” Assembled Upper Receiver is a great choice for your next AR-15 build!
The flash hider that comes with this complete upper receiver is NOT pinned nor welded to this barrel. Per the National Firearms Act, the muzzle brake MUST be pinned and welded to achieve the necessary 16"" as defined by the ATF for a rifle build.