Tandemkross ADX Race Rifle, SBR & Pistol: Specs and Prices

The ADX (short for Advantage X) is TANDEMKROSS's own .22 LR receiver, and the ADX line is the first family of complete guns built around it: a Race Rifle, an SBR, a Pistol, and a barreled action for custom builds. The three complete guns marry the ADX receiver to the Manticore X Lower, TANDEMKROSS's aluminum chassis with the trigger, safety, and magazine release machined into one part, and every ADX receiver takes standard Ruger 10/22 magazines.

TANDEMKROSS first showed the receiver at SHOT Show 2025 as an ambidextrous 10/22-pattern part, then built it into complete firearms that reached the market in September 2026. For a shooter who has already rebuilt a 10/22 with TANDEMKROSS parts, the ADX is the step that replaces the last Ruger component left on the gun, the receiver itself. Our Ruger 10/22 upgrades guide covers the parts-by-parts route to a similar rifle.

The ADX moves the charging handle to the left side of the receiver, where the support hand can run it without the firing hand leaving the grip or the eye leaving the optic. Pull the handle back, lift it into a steel-reinforced notch, and the bolt stays open. Swipe it down out of the notch and the bolt slams home, the same motion an MP5 shooter uses.

On a factory 10/22, locking the bolt back takes two hands: one holds the charging handle while the other pushes the bolt lock lever in front of the trigger guard. On the ADX it is one motion with one hand, which matters most at the end of a Steel Challenge stage when the range officer asks you to show clear. The receiver still accepts right-side 10/22 charging handles, including the factory Ruger handle and the TANDEMKROSS Spartan, for anyone who would rather keep the conventional layout.

The ADX receiver closes at the back with a removable rear cap held by a self-retaining pin. Pull the pin and the cap, and the recoil spring, charging handle, and bolt slide out of the rear of the receiver. A standard 10/22 makes you compress the recoil spring to get the bolt in or out under tension.

The open rear also lets a solid cleaning rod run down the bore from the chamber end. TANDEMKROSS says the whole gun field strips by removing three pins. One trade-off comes with the design: the rear cap takes the place of an aftermarket bolt buffer, so a Shock Block or similar buffer does not go in an ADX. The receiver carries an integral extended Picatinny rail with a skeletonized channel and a Teflon-impregnated hardcoat black anodize to cut friction from the bolt.

The ADX Barreled Action is the serialized receiver with the left-side charging handle assembly, the rear cap, a barrel retaining V-block, and either the 16.5 inch Spitfire or 10.2 inch Comet barrel already installed, in black or stainless. Prices start at $744.99 for the 10.2 inch stainless configuration and rise with barrel length and a black finish.

No bolt, trigger assembly, or stock comes in the box. TANDEMKROSS points builders at its KrossFire bolt or a factory bolt, a Manticore trigger assembly, and any stock or chassis cut for a .920 bull barrel channel. The 10.2 inch configuration is for a pistol build or an SBR; putting a shoulder stock on it makes a short-barreled rifle under federal law. Our 10/22 chassis and stocks guide covers the bull-channel stocks that fit.

The TKX22 Light Rifle at $1,449.99 is the conventional-layout TANDEMKROSS rifle, and it was the company's first complete gun. It uses the TKX22 receiver, a billet 6061-T6 aluminum receiver with the standard right-side 10/22 charging handle, so it keeps the full 10/22 trigger, stock, and charging handle aftermarket open. It ships with a Manticore LITE trigger adjustable from 2.5 to 5.5 lb, a Magpul MOE X-22 stock with a 13.75 inch length of pull, Eagle Eye fiber optic sights on M-LOK, and the same threaded 16.5 inch Spitfire barrel.

The ADX Race Rifle costs more for the left-side bolt lock, the rear cap, the folding stock, and the Manticore X Lower's AR-grip ergonomics, and it weighs 55.4 oz against 54 oz for the TKX22. A shooter who wants iron sights and a traditional stock should buy the TKX22. A shooter who runs a red dot in timed matches and wants faster reloads should buy the ADX. The TKX22 is also sold as a barreled action from $544.99.

Every ADX barrel is threaded 1/2x28, the standard .22 LR muzzle thread, so a rimfire suppressor with a 1/2x28 direct-thread mount screws straight on. Our best .22 suppressors guide ranks the cans worth pairing with it. M-LOK slots on the barrel sleeve and forend take lights, lasers, and hand stops, and the integral receiver rail takes a red dot. For optic picks, see our rimfire scopes guide. To plan the rest of the rifle, load the ADX Race Rifle in the rifle builder and add an optic, light, and can.

The ADX Race Rifle is for rimfire competitors who already know a stock 10/22 slows them down: Steel Challenge, NSSF Rimfire Challenge, and similar timed matches reward the support-hand bolt lock and the adjustable trigger. It is also the cleanest way to get a folding, suppressor-ready rimfire without assembling parts yourself, and TANDEMKROSS covers it against mechanical failure for life.

It is not the value pick. A factory Ruger 10/22 plus a trigger, barrel, and stock costs less, keeps the right-side layout, and still runs every magazine the ADX does. Our best .22 LR rifle guide covers the cheaper starting points.

Every ADX, including the barreled action, is serialized and ships only to an FFL. TANDEMKROSS does not ship the complete ADX guns to California, Colorado, Connecticut, Delaware, Hawaii, Illinois, Maryland, Massachusetts, New Jersey, New York, Oregon, Rhode Island, Vermont, Washington, or Washington DC.

The ADX SBR is a short-barreled rifle under federal law, and TANDEMKROSS ships it only to a dealer holding SOT status. Since October 9, 2026, ATF has not enforced Form 4 approval or NFA registration for SBR transfers, and dealer sales still run a Form 4473 and NICS check. State law did not change: confirm with your dealer that your state allows an SBR and whether it requires federal registration before you order.