The ArmaLite AR-10 Model AR103GN18 is a .308 Win/7.62 NATO semi-auto rifle engineered for shooters who demand speed and precision on the competition line. Built around a proven modular platform, this rifle combines match-grade componentry with practical features that make it a genuine contender in 3-gun and tactical rifle competitions. Whether you're stacking targets at distance or running dynamic stages, the AR103GN18 delivers the accuracy and reliability that separate winners from the rest of the field.
The 18-inch stainless steel barrel is crowned with ArmaLite's tunable muzzle brake, giving you the flexibility to dial in the recoil management that works for your shooting style and competition rules. A crisp Timney 4-pound single-stage trigger breaks clean and predictably—no creep, no surprises when you need a fast, accurate shot. The lightweight MBA-1 adjustable buttstock lets you dial in both cheekpiece height and length-of-pull so the rifle shoulders the same way every time, a detail that matters when you're running stages under the clock.
Ergonomics favor the competitor: an ambidextrous safety keeps you shooting without fumbling, the Raptor charging handle cycles smoothly whether you're right or left-handed, and the Ergo wide grip fits naturally in competitive holds. At 8.9 pounds, the AR103GN18 stays light enough to manage through transitions without fatiguing you over a long match day. Aluminum receivers keep weight down without compromise, and black anodized surfaces deliver the finish you expect. Out of the box, you'll find a 25-round Magpul PMAG included—the magazine choice of serious competitors.
This is a rifle that ships ready to compete. No hunting-focused compromise, no budget-cut shortcuts. Just the features and components that matter when milliseconds and inches count.
| Caliber | .308 Win / 7.62 NATO |
| Action | Semi-Auto |
| Barrel Length | 18 inches |
| Barrel Material | Stainless Steel (1:10 twist) |
| Muzzle Device | ArmaLite Tunable Brake |
| Magazine Capacity | 25 rounds |
| Receiver Upper | Aluminum, Black Anodized |
| Receiver Lower | Aluminum, Black Anodized |
| Stock | MBA-1 Adjustable (LOP & Comb) |
| Grip | Ergo, Black |
| Trigger | Timney Single-Stage, 4 lb. pull |
| Safety | Ambidextrous |
| Charging Handle | Raptor |
| Overall Length | 40.3–41.5 inches (stock dependent) |
| Weight | 8.9 lbs. |
| Included Magazines | One 25-round Magpul PMAG |
Yes. The AR103GN18 ships with the features competition shooters rely on: a quality trigger, adjustable stock for cheek weld consistency, ambidextrous controls, and a 25-round magazine. You can run it straight to the line.
Absolutely. The MBA-1 buttstock adjusts both length-of-pull and cheekpiece height, so you can dial in the fit whether you're shooting in shirtsleeves or wearing body armor.
The 18-inch stainless barrel has a 1:10 twist, standard for .308 Win / 7.62 NATO and suitable for a wide range of bullet weights.
You'll receive the rifle and one 25-round Magpul PMAG ready to load and shoot.
Firearm Shipments:
To buy rifles or shotguns, you must be 18 years old, and for handguns, actions, or receivers, the minimum age is 21. By placing an order for this firearm, you confirm that you are the legitimate transferee/buyer, meet the legal age requirements, and comply with all Federal, State, and local laws and regulations necessary to purchase this firearm.
We only ship firearms to valid Federal Firearms License (FFL) holders. At checkout we provide a FFL locator for your convenience.
We will need a copy of the FFL’s license to facilitate the process, kindly request your dealer to email us a copy of their FFL, as we cannot dispatch the firearm until we receive this document. It is imperative for the buyer to choose their FFL dealer, ensure they are willing to facilitate the transfer, and have them email their FFL copy to BOSQUE Outdoors. To avoid any confusion, the customer's name or order number must be mentioned in the email containing the FFL.
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ArmaLite
ArmaLite
