IMPORTANT INFORMATION:
- Shipping and FFL transfer fees are the responsibility of the customer.
- This product is NOT eligible for free shipping promotions.
- This firearm is a serialized product or “regulated good” and will NOT be shipped directly to the purchaser. This product requires an FFL transfer and we will ONLY send it to your designated FFL.
- This firearm is a Short Barreled Rifle and may only ship to an FFL with a valid SOT and can only be transferred with a valid ATF form 4. Please contact your local dealer for questions regarding the process and legalities in your locale prior to purchase.
At a Glance:
- Improved ergonomics with left-hand charging
- Streamlined maintenance with removable back cap
- Simplified handling with easy bolt lock and release
The ADX SBR is designed to take your shooting experience to a whole new level. This premium rimfire firearm offers exclusive features while broadly supporting Ruger® 10/22® components and magazines. Your customization options are endless!
The ADX receiver at the heart of this rifle stands above its competitors with numerous patented innovations. Most prominent among these is the left-side charging handle, allowing easy charging and bolt manipulation with your support hand without disrupting your sight picture or breaking your firing grip. The charging handle is articulated for easy bolt lock-back functionality as well. With the handle pulled back, simply lift the charging handle up into the steel-reinforced locking notch and the bolt will hold open. Gone are the days of holding the bolt back while also trying to manipulate a separate element in order to lock the bolt open. To close the bolt, simply swipe the handle down and out of the locking notch with a swift, satisfying slap.

Even cleaning and maintaining your ADX is easier than other rimfire platforms. Unlike its competitors, you can completely field strip the receiver of your ADX SBR by simply removing just three pins. Successfully removing a bolt from a similar fully assembled rimfire firearm would usually take minutes and a combination of tools. This is now achievable with a single punch or other tool like a handy allen key or chamber flag.
The ADX receiver features a removable back cap that greatly simplifies removal and reinstallation of the bolt and charging handle. While competing options require you to fully compress the recoil spring assembly to remove or install the bolt under substantial spring tension, the rear of the ADX receiver is secured with a self-retaining pin. Once the pin and rear cap are removed, the recoil spring, charging handle, and bolt assemblies simply slide to the rear of the receiver with ease. This also opens up the rear of the receiver for much easier access to otherwise hard-to-reach interior nooks and crannies for cleaning. This additionally allows for the simplified use of a solid rod for cleaning the bore. To reassemble the action, simply drop the charging handle assembly and bolt into place, slide them forward, and reinstall the back cap to get back to the range.
Along the top of the ADX receiver is an integrally machined extended picatinny rail with a skeletonized channel down its length. This provides ample rigid optic mounting real estate with minimal weight. The receiver is finished with a proprietary Teflon-impregnated hardcoat black anodizing to increase durability and reduce friction from the bolt even after high round counts.
Anchoring the receiver is the Manticore X Lower, TANDEMKROSS’s innovative and ergonomic fire control group assembly. TANDEMKROSS’s Manticore X Lower transforms traditional rimfire rifle trigger packs into something more akin to an AR-style lower, allowing the firearm to be dissected into upper and lower halves with just two self-retaining takedown pins. An enlarged bolt lock, bi-directional magazine release, pull-weight-adjustable trigger, ambidextrous rotary safety, and more make Manticore X one of the most comprehensive fire control group upgrades on the market. More than just another trigger assembly, TANDEMKROSS’s unique lower brings rimfire sporting firearms into the modern era by redefining how the firearm should look, operate, and feel. Instead of a traditional form factor where the trigger assembly and chassis or stock are all separate parts, the Manticore X Lower is an integral system that seamlessly unites these components.
The adjustability does not stop there. This SBR ships with a folding picatinny buttstock set to fold to the left and in the inline configuration, best suited for use with tall sights or optics on risers. The user, however, can reconfigure that stock to fold in the other direction, modify its comb height by moving it up or down on the picatinny on the lower, or its placement on the folding adapter. The user can also choose to keep the stock in the inline configuration or adjust it to a 12° downward-angled position ideal for use with lower-profile sights and optics closer to the bore axis. Additionally, the SBR ships with a replacement buffer tube mount for even more customization options for those who prefer telescoping buttstocks. Manticore X Lowers additionally feature a reversible quick-detach (QD) sling mount.
Rounding out the build is TANDEMKROSS’s industry-leading lightweight Comet barrel, which comes threaded ½”x28 for use with compensators, suppressors, and other muzzle devices. The tensioned barrel sleeve provides rigidity to maintain accuracy, but is cut for M-LOK® accessories, providing more space for lights, lasers, and more while also reducing weight and venting away heat. The sum of its parts allows for unparalleled accessorization on a barrel that punches well above its weight in terms of accuracy.
Specifications:
- Length: 27.25” unfolded, 19” folded
- Length of Pull: 12.25”
- Weight: 52.1oz unloaded
- Operation: Semiautomatic, direct blowback
- Caliber: .22 Long Rifle
- Barrel Length: 10.2”
- Barrel Twist Rate: 1:16”
- Chambering: Sporting
- Muzzle Threading: ½”x28
This firearm is assembled with:
- ADX receiver for Ruger® 10/22® pattern firearms
- Comet Lightweight Barrel for Ruger® 22 Charger™
- M-LOK® Forend for Manticore X
- TANDEMKROSS Barrel Retaining V-Block for Ruger® 10/22®
- KrossFire Bolt for Ruger® 10/22®
- Manticore X Lower for Ruger® 10/22®
- Die Free Co Kung-Fu grip
- Folding Picatinny Buttstock by Rim/Edge
This firearm includes:
- 1x Doublekross magazine
- 1x Buffer Tube Mount for Manticore X by Rim/Edge
- 1x cable lock
IMPORTANT: Cannot ship to California, Colorado, Connecticut, Delaware, District of Columbia, Hawaii, Illinois, Maryland, Massachusetts, New Jersey, New York, Oregon, Rhode Island, Vermont, or Washington State. Do not purchase this item if you have a billing or shipping address associated with these locations.
This product is protected against mechanical failure for life by TANDEMKROSS’s Lifetime Guarantee. Learn more about our warranty and returns policies here.
⚠️ WARNING: This product can expose you to chemicals including chromium, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov