Upper Fresh Start Kit: Davidson Defense Stripped Upper + Davidson Defense Forward Assist Assembly + Recoil Technologies AR-15 Ejection Port Kit + Omega Manufacturing AR-15 Carbine Length Gas Tube + United Defense Labs. .750 Adjustable Gas Block

Davidson Defense Stripped Upper with M4 Feed ramps - 7075 T6 Aluminum

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 Feed ramps 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 wears 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.

Davidson Defense Forward Assist Assembly AR-15

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.

Recoil Technologies AR-15 Ejection Port Door, Rod, and Spring

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

Omega Manufacturing AR-15 Carbine Length Gas Tube

FEATURES:

Carbine Length

Stainless Steel

CNC Machined Gas Key face

Premium Quality

Made in the USA

United Defense Labs. .750 Adjustable Gas Block

The Gas Block on your AR-15 / AR-10 style rifle is integral to the gas system that allows your rifle to cycle. By tapping off gas from the barrel and diverting it back into the gas key of the bolt carrier group, there is enough inertial force to unlock the bolt carrier, send it rearward to the recoil assembly, and extract and pick up another cartridge to fire.

About this Gas Block: This gas block is machined with a .750 Gas Block Journal. .750 Gas Block Journals are standard for AR-15 barrels chambered in .223 Remington, 5.56 NATO, and .300 Blackout. This Gas Block Journal is known for its reliability in assisting the rifle function in regular and adverse conditions. This gas block has a 'low-profile' design and is made to fit underneath a free-float handguard.

Gas Block Journal Size: This gas block is an average .750 size gas block.

Platform: This gas block will work on both AR-15 and AR-10 barrels, for .308 and 6.5 Creedmoor barrels, be mindful of possible tolerance issues in the barrel profile.

Adjustable: This Gas Block is adjustable, allowing the user to tune how much gas is needed, this is useful for testing different ammunition, running suppressors, or other adverse conditions that you may need to tune your gas settings with.

Profile: This Gas Block is 'low-profile' and designed to fit underneath free-float handguards.

Finish: Nitride - This gas block uses a nitride finish, making it have improved rust and corrosion resistance. Nitrided parts are typically glossy in texture.

Attachment Style: Slide On - This gas block has a fixed size must slide on from the front of the rifle, and is secured in place with 2 set screws near the bottom.

Material: Steel - This gas block is made from hardened & tempered steel, providing the strength and rigidity to withstand forces of expanding gasses and vibration from the rifle or pistol under operation.

DISCLAIMER: **Before purchasing, please be mindful of possible tolerance differences resulting from your handguard profile, barrel profile, gas length, and barrel Gas Block Journal.**