M4E1 7.5″ 5.56 Pistol Length Quantum Handguard Complete Upper Receiver


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This Complete Upper includes our Quantum Handguard! Key features include the addition of built in anti-rotation tabs, removable 4-slot picatinny rail section for front sight and a 7 mounting surface for accessories.Includes:M4E1 Enhanced Assembled Upper ReceiverQuantum Handguard of choice7.5″ 5.56 Pistol Length CMV BarrelLow Profile Gas Block and Pistol Length Gas TubeProduct comes assembledThis complete upper does not include BCG or Charging Handle. These products may be selected as add-ons under the Finish Your Build tabThe muzzle brake 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. M4E1 Upper Features:Forged from 7075 T6 aluminumPrecision machined to M4E1 specsM4 feedrampsMatte black hard coat anodized Mil 8625 Type 3 Class 2Laser engraved T-marks (Anodized only)Comes assembled, with port door and forward assist installedAccepts standard AR15/M16 componentsHandguard mounting platform is forged into the receiverWorks with Aero Precision handguards but also fits most BAR-system handguardsBarrel nut and wrench are includedQuantum Handguard Features:1pc free float designRemovable 4-slot picatinny rail section for front sightBuilt in anti-rotation tabs7 mounting surfaces for KeyMod accessories1.78″ inside diameter fits most muzzle devices and 1.5″ suppressorsCompatible with low profile gas blocks7.5″ 5.56 Pistol Length Barrel Features:Chamber: 5.56Length: 7.5″Twist: 1 in 7Threading: 1/2″x28Material: Chrome Moly VanadiumFinish: QPQ corrosion resistant finish both inside and outGas Block: .750Gas System Length: PistolWeight: 17.25ozM4 Barrel ExtensionHP and MPI Tested

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