- Messages
- 57
- Reactions
- 83
- Ad Type
- For Sale
- Price
- $835
- Manufacturer
- Other / Not Listed
- Caliber
- 5.56x45mm NATO
- City
- HILLSBORO
- State
- Oregon
Description 16" CARBINE AGENCY BASE RIFLE Adams Arms AR15 Gas Piston Rifle. Agency Base Rifle. All of what you expect from the AR15 plus the benefit of Gas Piston reliability and less maintenance. In 1957 Eugene Stoner developed the AR15/M16 rifle that shoots the .223 Remington/5.56 NATO caliber rounds. The design of this rifle utilizes the gases that push the bullet down the barrel to cycle the action of the semi-automatic and full-automatic AR15/M16 rifle. These gases are vented into a gas tube through a hole on the barrel (the gas port). The gases travel back toward the receiver of the firearm and use its pressure to push the bolt carrier backwards toward the stock of the rifle. This utilization of gases to cycle a firearm's action is known as Direct Impingement. It is the biggest flaw and concern with the AR15/M16. Because these gases are released into the receiver, a layer of carbon and burnt gases coat all the moving part of the firearm. This also leaves a lot of heat inside the receiver causing undue stress and wear on many critical parts. The Gas Piston operating system help eliminate this issue by venting the dirty gases and keeping the gun cooler similar to the AK47 operating system . Adams Arms Rifle Specs Mil-Spec Forged 7075-T6 Lower Receiver, Type III Class II Hard-coat anodized finish, beveled magwell, machined chevrons in front strap Mil-Spec Forged7075-T6 M-4 Upper Receiver, Type III Class II Hard-coat anodized finish, M4 feed ramps, 1913 Picatinny rail flat top with dry lube internal finish and laser engraved T-markings 16" 4150 CM Melonited Barrel 1:7 twist Chambered .223/5.56 x 45 mm NATO Mil-Spec Six Position Retractable Stock A2 Flash Hider M-4 Style Thermoset molded polymer hand guards with lower heat shield Comes with Life-Time performance warranty from Adams Arms. Comes with 1 -30 Round mag , Type and style may vary Specifications: Upper Receiver: A4 Flat-Top, Forged Barrel Length: 16" Barrel Contour: Government Barrel Material: 4150 Chrome Moly Vanadium Steel Muzzle Thread Pattern: 1/2"-28 Chrome Lined: No Barrel Finish: QPQ Melonite / Black Nitride Twist Rate: 1 in 7" Chamber: 5.56x45mm NATO M4 Feed Ramps: Yes Bolt Carrier: 1-Piece w/Integral Piston Strike Face Muzzle Device: A2 Flash Hider Gas System Length: Carbine, Short Stroke Piston Operated Gas Block Diameter: 0.750" Handguard: 2-Piece Polymer, Carbine-Length Sights: None, Single Rail Gas Block Grip: Standard A2 Trigger: Mil-Spec Standard Trigger Weight: 6.208 lbs Model # AA-15
