Description
The MBGL GOAT-15 ATOM HC 22 LR Pistol is the high-capacity configuration of Mountain Billy Gun Lab’s featherweight AR-style rimfire pistol. Distributor listings rate it at 10+1, making it the version to choose for plinking, steel targets and training sessions where you want more than a single round between reloads.
MBGL GOAT-15 ATOM HC 22 LR Pistol Overview
Like every GOAT-15, the ATOM HC uses polymer upper and lower receivers to keep weight to about 1 pound 14 ounces unloaded, or roughly 2 pounds 2 ounces with a loaded 10-round magazine. The 7.8-inch CMV steel barrel has a 1:16 twist, a black oxide finish and 1/2-28 threads. A top Picatinny rail, an M-LOK handguard and a rear 1913 rail for a brace give you plenty of mounting options, and the patented tamper-resistant safety is standard.
Why the HC Version
The standard ATOM is listed by distributors with a one-shot capacity, while this HC model is listed at 10+1. If you live where standard-capacity magazines are legal and plan to shoot steel or practice drills, the HC saves the cost of buying a magazine separately. MBGL also sells a 25-round magazine where legal. Confirm magazine contents with your order.
Steel and Plinking
Light weight and mild recoil make the ATOM HC fun on steel plates and spinners, and the 22 LR ammo bill stays modest compared with centerfire. Add a compact red dot, since there are no factory sights. A brace on the rear rail adds stability; follow current federal and state guidance on brace use, which has changed several times.
Reliability Notes
Blowback rimfire guns this light can be sensitive to ammunition. High-velocity 22 LR generally cycles most reliably, and cleaning the chamber and bolt face every few hundred rounds prevents most stoppages. Polymer receivers keep weight down but are less rigid than aluminum, so avoid overtightening accessory screws.
Quiet Training
The 1/2-28 threads accept most rimfire suppressors, turning the ATOM HC into a very quiet trainer with standard-velocity ammunition. Suppressors are NFA items requiring an approved ATF Form 4 and state legality, and rimfire suppressors need frequent cleaning.
Considerations
GOAT-15 magazines are proprietary, so you cannot borrow 10/22 or AR rimfire magazines. Accessory and holster support is limited for this new platform. For hikers who value every ounce, few semi-auto 22s come close to its weight.
State Laws and Ownership
Pennsylvania buyers complete a PICS check at the receiving dealer and AR-style rimfire pistols are legal in the state. Some states restrict pistols with threaded barrels or magazines outside the grip, even in 22 LR, and a few cap magazine capacity. Check your state and local rules before ordering.
Specifications
- Model: GOAT-15 ATOM HC pistol, listed 10+1 capacity
- UPC: 850022225789
- Manufacturer: Mountain Billy Gun Lab (MBGL), made in the USA
- Caliber: 22 LR
- Action: Blowback semi-auto
- Barrel: 7.8-inch CMV steel, black oxide, 1:16 RH twist, threaded 1/2-28
- Overall length: about 14.1 in.
- Weight: 1 lb 14 oz unloaded
- Receivers: Polymer upper and lower
- Rails: Top Picatinny, M-LOK handguard, rear 1913 rail for a brace
- Safety: Patented tamper-resistant
- Sights: None (red dot recommended)
Before You Buy
Federal law requires handgun buyers to be at least 21 years old to purchase from a licensed dealer and to pass a background check. This pistol ships to your local FFL, where you complete ATF Form 4473. Confirm magazine capacity limits in your state.
Who It Is For
The MBGL GOAT-15 ATOM HC 22 LR Pistol is a great fit for plinkers and steel shooters who want a featherweight AR-style 22 with real capacity, backpackers and campers, and suppressor owners looking for a quiet trainer.
Buy the MBGL GOAT-15 ATOM HC 22 LR Pistol at MAG5 Firearms
MAG5 Firearms is a family-owned FFL in Collegeville, Pennsylvania. Order the MBGL GOAT-15 ATOM HC 22 LR Pistol online and ship it to your local FFL dealer, or browse our full selection of firearms for more pistols. For factory details, visit Mountain Billy Gun Lab.
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