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One Time Offer
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This Adams Arms P1 Mid Gas Piston Upper Assembly is chambered in 5.56x45mm NATO and comes ready to fire right out of the box after installation onto any standard AR-15 lower receiver. The Base Mid upper comes equipped with a 16" melonite-finished barrel, A2 flash hider, bolt carrier group, charging handle, picatinny rail gas block, delta ring assembly and Magpul MOE handguards. Additional features include a forged A3 flat-top configuration that's ready to accept the shooter's choice of optic and/or rear iron sight, M4 feed ramps to help ensure reliable feeding and functioning during rapid strings of fire, and a mid length gas system for a smoother recoil impulse and longer sight radius.
The upper's barrel has been finished inside and out with Adams Arms' proprietary QPQ Melonite treatment that bonds with the metal on a molecular level. Also referred to as salt bath nitriding, this treatment produces an extremely hard, slick surface on steel that resists carbon adhesion and increases corrosion resistance, extending a barrel's service life by reducing the friction produced inside the bore upon firing for a net decrease in bore surface wear over time. Nitriding converts the barrel steel's surface without any build-up, retaining all of the benefits of traditional chrome lining without suffering the accuracy degradation commonly encountered with it due to the uneven application of chrome inside the barrel's bore. The end result is a barrel that's capable of producing accuracy on par with a match stainless steel tube, while also exhibiting the longevity and resilience of a chrome lined, mil-spec barrel.
All Adams Arms uppers feature a short stroke gas piston operating system, which prevents hot gas and debris from being directed back into the action upon firing. The result is a rifle that runs cooler, cleaner and more reliably than those utilizing a standard direct gas impingement system of operation. To ensure that damage doesn't occur to the buffer tube from carrier tilt, the bolt carrier is equipped with enlarged "skis" to help guide it into the receiver extension. The bolt carrier's solid steel, 1-piece construction incorporates an integral piston strike face to guarantee integrity over time, while the bolt assembly is spring loaded for proper lock-up and to help reduce bolt bounce and cam pin wear. All piston components are finished in QPQ Melonite for corrosion resistance and easy cleaning/maintenance.
Must Ship to FFL Dealer
Guns must be shipped to an FFL Dealer for transfer. You will have the opportunity to find and choose one in your area before placing your order.
The total weight of the product, including the product’s packaging as it sits on our shelf. Since some products ship directly from supplier, their weight may be unavailable. Because of variations in the manufacturing process, similar products may have differing weights. Unless the product is designated as “Ships Alone”, Shipping Weight does not include the shipping box or packing materials associated with your order.
Product ships from MidwayUSA, separate from any other products on your order due to its size. Products that are Shipped Alone incur separate "Per Order" and "Per Pound" shipping charges.
Incurs additional shipping charges due to the large or irregular shape of the product.
Product regulated by the US Department of Transportation (DOT) and cannot be shipped via air shipping methods. DOT-Regulated product quantities and restrictions may limit available ground shipping methods.
Product is restricted by shipping carriers and cannot be shipped to certain locations or via certain shipping methods.
Cannot ship via air
Cannot ship via USPS
Cannot ship to PO Box
Must ship to Contiguous US
Additional charge, per warehouse, for HazMat products. Carriers charge extra to ship packages with products they consider hazardous, such as reloading powder and primers. Ramshot and Accurate powers ship from a different warehouse than other powders or primers.
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