Starter Kit: Davidson Defense Stripped Upper w/ Forward Assist And Dust Cover + Davidson Defense Black Diamond Series Executive 7" M-Lok Handguard

Upper Receivers mount and house the barrel, handguard, and gas system in an AR-15 or LR-308/AR-10. Mil-Spec upper receivers are made to 'Military Specification' and are meant to either match or exceed the military requirements imposed onto the design for its service rifles. Featuring a full-length 1913 Picatinny rail section on the top for mounting Optics and Iron Sights and has a Standard Milled Forward Assist section.

About this Upper: This upper AR-15 receiver features a standard 'Mil-Spec' design made out of Forged 7075-T6 Aircraft Grade Aluminum. With a Standard rifle cartridge-size ejection door. Made by Davidson Defense, the Upper with M4 Feedramps is precision CNC machined and ready for your next build!

Material: 7075-T6 Aluminum - 7075-T6 Aluminum is a high-strength alloy metal with great ductility, toughness, and resistance against fatigue. 7075-T6 was standardized for use in Aerospace equipment and aircraft. The Suffix T6 is a temperament treatment to increase the overall toughness and strength of the Aluminum. 7075-T6 Aluminum was chosen for the AR-15 platform for its ease of manufacturing, lightweight properties, and strength.

Style: Mil-Spec - Mil-Spec is the standard for the United States Military for reliability, commonality, reduced cost, and meeting the requirements of a service rifle. 'Mil-Spec' is the essential technical requirement for military-unique materiel or substantially modified commercial items.

Finish: Anodized - This upper receiver is anodized, this process increases the thickness and hardness of the natural oxide layer on the surface of the metal parts. This increases the corrosion and wear resistance of the Upper Receiver.

Caliber Compatibility: This upper receiver will work with standard rifle cartridges such as .223 Remington,5.56 NATO, .300 Blackout, 6.5 Grendel, 7.62x39, 9mm Luger, and .350 Legend. This will also work with 9mm Pistol Caliber Carbines.

Top Section: Flat Top Rail - This upper receiver features a full 1913 Picatinny rail for the additional Optics installation and Iron Sight installation.

Anti-Rotation Tab Compatibility: This upper receiver will allow the installation of handguards with anti-rotation tabs incorporated into their design.

High-quality, Mil-Spec parts. Replace worn or damaged parts to return a service rifle to factory specs or use it in building a precision custom rifle that meets your exact requirements. Complete, prepackaged kits include all the parts you need for specific sub-assemblies. Saves time and money no need to hunt down each item individually. Includes plunger, forward assist pawl, spring, and retainer pin.

Dust Doors on the AR-15 / M16 platform are a barrier between the action and the elements, under constant spring pressure, the action of the bolt carrier reciprocating or being manually cycled the dust door will open up allowing ejection out of the door. During travel, the dust door can be closed and held in place with a captive detent holding it against a groove cutout in the upper receiver. Typically made from the same grade of aluminum that the upper receiver is made from, dust doors are a great way to protect the internals of your build!

About this Dust Door: High-quality, Mil-Spec parts from a US maker. Includes cover, hinge pin, spring, and snap ring. Spring and clip may vary as to color.

Material: Aluminum - This dust door is made from the same aluminum found on the upper and lower receiver of an AR-15.

Compatibility: Standard Size Upper Receiver Door

Color / Finish: Black

One of the most critical components of any AR-15 custom build is the handguard. In recent years free-float handguards (LINK [https://www.mmcarmory.com/Freefloating_c_3464.html]) have increased in popularity. The free-float handguard covers the barrel and is attached to the upper receiver via a barrel nut. The handguard serves many functions in an AR-15 build kit such as protecting the shooter's hand from being burned by the barrel, offering the shooter something to grip to help steady the weapon, can function as the attachment point for sights/optic, can have additional accessories attached, and adds to the aesthetic appeal of the build.

It is recommended that the handguard completely cover the gas system of the AR-15 so please consider your gas system length when shopping for a handguard. If you wish to buy a pre-designed upper build kit equipped with a handguard please visit our AR-15 & LR-308 Upper Build Kits (LINK [https://www.mmcarmory.com/ar-15-lr-308-upper-build-kits.html]) page.

About this Handguard: This Davidson Defense Black Diamond Series "Executive" AR-15 Freefloat Handguard is 7" in length and has an M-Lok rail mounting system.

Mounting System: The 7" Black Diamond Series "Executive" AR-15 Freefloat Handguard utilizes the M-Lok mounting system for easy and solid mounting of different accessories & grips on multiple different positions of the handguard.

Cuts: The 7" Black Diamond Series "Executive" AR-15 Freefloat Handguard has a circle cut into the handguard. This design adds to the aesthetic appeal and saves weight without compromising structural integrity.

Material of Handguard: The Davidson Defense Black Diamond Series "Executive" AR-15 Freefloat Handguard is precision CNC machined from a high-quality 6061-T6 aircraft-grade aluminum extrusion. This ensures that the handguard will be both extremely light and very strong.

Barrel Nut: The 7" Black Diamond Series "Executive" AR-15 Freefloat Handguard comes with a high-quality steel barrel nut and mounting hardware

Type of Top Rail: This 7" Black Diamond Series "Executive" AR-15 Freefloat Handguard is CNC machined with a Picatinny rail across the top of the entire handguard.

Includes: Mounting System, Handguard, Barrel Nut.