Blackout Dynamics Quantum DTL-X 223 Wylde 14.5" P&W Plan B Muzzle Forward Assist FDE Upper Receiver The Blackout Dynamics Quantum DTL-X .223 Wylde upper receiver group pairs a 14.5" polished cryo-treated 416R stainless steel barrel with Blackout's Dual Taper Lock (DTL-X) barrel and handguard mounting system. This configuration uses a forward assist upper receiver in a Flat Dark Earth (FDE) finish and comes with a Blackout Dynamics Plan B muzzle device that is pinned and welded to the barrel. It is a complete upper receiver group, built to drop onto your AR-15 lower. Blackout Dynamics machines the upper receiver and handguard to line up precisely, so the two look and feel like a single monolithic piece. Alignment pins between the upper and handguard add structural rigidity. The .223 Wylde chamber safely runs both 5.56 NATO and .223 Remington ammunition while retaining the accuracy potential of a match-style chamber, and the 1:8 twist handles a wide range of bullet weights. Key Features Dual Taper Lock (DTL-X) system: two tapers and two interlocking barrel nuts center the barrel in the upper and stabilize the chamber. HELIX gas regulating barrel system: a tool-less adjustable gas control knob built onto the barrel for tuning suppressed or unsuppressed. 14.5" 416R stainless steel barrel, cryogenically treated with a polished cryo finish and 5R rifling, 1:8 twist. Thermal expansion ring cuts guide heat growth along the bore to help limit point-of-impact shift. Forward assist upper receiver machined from aerospace grade aluminum with reinforced walls. M-LOK handguard with five full-length M-LOK slotted sides, two more partial slots up front, and a full-length Picatinny top rail. Anti-rotation alignment pins between the upper and handguard for monolithic-like rigidity. Bolt carrier group and charging handle included. Blackout Dynamics Plan B muzzle device, pinned and welded to the barrel. Mil-spec lower compatible, and compatible with SilencerCo and Radian lower receivers. Dual Taper Lock System The DTL-X system uses two tapers and two interlocking barrel nuts. The taper on Blackout's custom barrel extension mates with a taper inside the first barrel nut, and a second taper on the barrel profile mates with a taper inside the second barrel nut. That push-pull relationship keeps the barrel bore and the upper receiver concentric while stabilizing the chamber, adding rigidity and harmonic dampening right over the chamber for a smoother shooting experience and longer-lasting accuracy. It also gives the handguard an exceptionally rigid base, so there is no handguard deflection and far less point-of-impact shift from bumps and impacts. HELIX Gas Regulating Barrel System The HELIX system puts an adjustable gas control knob directly on the barrel, so you can tune gas flow for running suppressed or unsuppressed without tools. It uses a robust detent system, an M42 cobalt steel adjustment rod and a high-temperature spring, and Blackout Dynamics proved the design through 1,500 rounds of accelerated full-auto testing with zero failures. Upper Receiver and Dust Cover The upper receiver is machined from aerospace grade aluminum with enhanced walls for more rigidity while keeping a low profile. The dust cover is fully contained in the upper: instead of relying on a C-clip, the hinge pin is held in place by the barrel nut, and a thin locking groove lets the dust cover's ball detent cut its own channel for a positive, audible lockup and exact alignment. This configuration uses a forward assist upper finished in Flat Dark Earth. Handguard The DTL-X handguard completes the monolithic-like look when paired with the upper. It gives you five sides of full-length M-LOK compatible slots, with two more slots at the front for a partial seven-sided layout, plus a full-length Picatinny top rail for optics, lights, lasers and grips. The barrel nut is hidden for a clean look, and the handguard is hand deburred. Barrel The 14.5" barrel starts as premium 416R stainless steel bar stock that is gun-drilled and reamed with 5R rifling in a 1:8 twist. The blanks are fully stress relieved and air gauged before profiling, threading and chambering, then cryogenically treated and given a polished cryo finish. Linear expansion rings along the barrel profile control heat growth during heavy use, guiding the barrel to expand in the direction of the bore instead of deflecting and shifting your point of impact. Gas is routed through a mid-length gas system. Bolt Carrier Group and Charging Handle This upper receiver group includes a bolt carrier group and a black charging handle. The Blackout Defense bolt carrier is made from 8620 steel, and the shot-peened bolt is made from either 9310 or Carpenter 158 steel. Bolts are batch high-pressure tested and individually magnetic particle inspected after heat treat to check for microcracks. Pinned and Welded Plan B Muzzle Device This upper comes with a Blackout Dynamics Plan B muzzle device that is pinned and welded to the barrel, so it stays permanently attached. Compatibility and Fit The Quantum DTL-X upper fits mil-spec AR-15 lowers as well as SilencerCo and Radian lower receivers. Browse more complete uppers or see all Blackout Dynamics products at BattleHawk Armory. Specifications Manufacturer Blackout Dynamics Model Quantum DTL-X Part Number URG-DTL-X-223W-14.5-FWD-FDE-PIN-PLANB UPC 810211604337 Type Complete upper receiver group (URG) Caliber .223 Wylde Barrel Length 14.5" Barrel Material 416R stainless steel Barrel Finish Polished cryo Twist / Rifling 1:8, 5R rifling Gas System Mid-length Gas Block HELIX tool-less adjustable Handguard DTL-X M-LOK handguard with full-length Picatinny top rail Upper Receiver Forward assist, aerospace grade aluminum Finish Flat Dark Earth (FDE) Cerakote Muzzle Device Blackout Dynamics Plan B muzzle device, pinned and welded Bolt Carrier Group Included Charging Handle Included, black Dust Cover Black Compatibility Mil-spec AR-15 lower receivers; SilencerCo and Radian lower receivers Frequently Asked Questions What is included with this upper? You get the complete Blackout Dynamics Quantum DTL-X upper receiver group: the forward assist upper receiver, the DTL-X M-LOK handguard, the 14.5" .223 Wylde barrel with the HELIX adjustable gas system, a bolt carrier group and a black charging handle, plus a pinned and welded Plan B muzzle device. A lower receiver is not included. Will it fit my lower receiver? It fits mil-spec AR-15 lower receivers, along with SilencerCo and Radian lower receivers. What ammunition can I shoot? .223 Wylde chambering runs both 5.56 NATO and .223 Remington ammunition. Can I adjust the gas for a suppressor? Yes. The HELIX gas regulating barrel system has a tool-less adjustment knob so you can tune gas flow for suppressed or unsuppressed shooting. Does the handguard have M-LOK slots? Yes. The DTL-X handguard has M-LOK slots on five full-length sides, two partial slots up front and a full-length Picatinny top rail.