Geissele Automatics Super Duty MOD1-A 5.56 NATO AR-15 SBR - 13.9" - DDC - No Mag - Short Barrel Rifle

The Geissele Super Duty MOD1-A 13.9-inch SBR in DDC delivers the full Super Duty MOD1-A specification in the most compact configuration the platform offers — fully ambidextrous controls, Stressproof Bolt from Carpenter 158+ with five times the fatigue life of a mil-spec bolt, SSA-E X two-stage trigger, HUXWRX QD flash hider for direct suppressor integration, and a cold hammer forged chrome-lined barrel, in Geissele's DDC (Desert Dirt Color) finish. NFA short-barreled rifle — Form 4 transfer required.

The Geissele Super Duty MOD1-A 13.9-inch SBR is a complete short-barreled rifle chambered in 5.56 NATO in DDC finish, built on SOLGW's ambidextrous billet lower receiver and Super Duty M4 upper. Features a 13.9-inch cold hammer forged chrome-lined barrel (1:7 twist, Geissele Tapered Profile, carbine gas), Super Compact Gas Block, HUXWRX Flash Hider-QD 556, SSA-E X trigger with Lightning Bow and Nanoweapon-coated internals, Airborne Charging Handle, Super 42 braided spring with H3 buffer, B5 Systems Enhanced SOPMOD stock, Geissele A17 grip, and Ultra Duty Lower Parts Kit. Integrated stainless steel QD inserts and Geissele QD Endplate. NFA: SBR — Form 4 transfer required. Note: confirm whether 13.9-inch barrel ships with pinned and welded muzzle device for 16-inch legal OAL or as a true sub-16-inch SBR configuration.

The 13.9-inch barrel is the longest sub-16-inch configuration in the Super Duty MOD1-A lineup — it provides more dwell time than the 11.5-inch variant, a gas system that is better positioned for suppressed use with reduced back-pressure sensitivity, and a slightly longer sight radius, while remaining compact enough to justify the NFA SBR classification for applications where overall length and maneuverability matter. The cold hammer forged chrome-lined barrel provides the bore wear resistance of the CHF process with the long-term corrosion and erosion protection of chrome lining — the combination specified for hard-use and high-round-count platforms. The fully ambidextrous control layout — left-side magazine release, right-side bolt catch and release, dust cover bolt catch actuator — provides faster reloads and malfunction clearances for both right and left-handed shooters, and improves mechanical flow under the stress of dynamic shooting. The Stressproof Bolt from Carpenter 158+ provides five times the fatigue life of a mil-spec bolt. The HUXWRX Flash Hider-QD provides direct QD compatibility with the HUXWRX FLOW suppressor series for seamless suppressor integration. The SSA-E X two-stage trigger with Lightning Bow and Nanoweapon-coated internals delivers a crisp, predictable break appropriate for a precision-capable SBR. DDC finish provides Geissele's desert earth tone color across all anodized components for a coordinated build aesthetic.

Caliber: 5.56 NATO. Barrel: 13.9-inch, CHF, chrome-lined, Geissele Tapered Profile, 1:7 twist, carbine gas. Gas block: Super Compact. Muzzle: HUXWRX Flash Hider-QD 556. BCG: Reliability Enhanced with Stressproof Bolt (Carpenter 158+). Trigger: SSA-E X with Lightning Bow, Nanoweapon-coated. Charging handle: Airborne (ACH). Buffer: Super 42 with H3. Stock: B5 SOPMOD. Grip: A17. Safety: Super Configurable. Lower: ambidextrous billet. Finish: DDC. NFA: SBR — Form 4 required.

13.9-inch barrel provides more dwell time and better suppressor-compatible gas system behavior than the 11.5-inch variant in the most compact Super Duty MOD1-A configuration. Fully ambidextrous controls enhance mechanical flow for all shooters under pressure. Stressproof Bolt Carpenter 158+ rated for five times mil-spec fatigue life. HUXWRX QD flash hider provides direct FLOW suppressor compatibility. DDC finish across all anodized components.

The right SBR for shooters who want the Super Duty MOD1-A's fully ambidextrous platform and HUXWRX suppressor integration in the compact 13.9-inch configuration — DDC finish, Stressproof Bolt, SSA-E X trigger, NFA Form 4 required.