Daniel Defense DDM4 GL/SSC, 5.56 NATO, 12.5″ Chrome-Lined Government Profile Barrel, Black, DD Pistol 30RD

Product Description

The Daniel Defense DDM4 GL/SSC is a compact 5.56 NATO pistol built on a legendary platform. Only 25 original examples ever reached civilian hands, making this factory reissue genuinely rare. It combines the precision of a service-rifle barrel with the maneuverability of a pistol-configuration firearm.

The 12.5-inch cold hammer forged barrel is chrome-lined and mil-spec finished. This same barrel-making process built Daniel Defense’s reputation for accuracy and reliability. Every firearm is hand assembled, quality assurance tested, and test fired before it ships.

Free-Float Rail and M203 Integration

The GL/SSC RIS II handguard free-floats the barrel for consistent accuracy. Additionally, every M203 mounting component integrates directly into the rail. No adapters, extra parts, or special tools are required to mount a light, laser, grip, or M203 launcher.

Because the rail free-floats, adding accessories does not load the barrel. Your point of impact stays constant. The continuous quad rail (12/3/6/9 o’clock) accepts all MIL-STD-1913 Picatinny-mounted optics and accessories.

At 6.2 pounds and 29 to 32.25 inches, the GL/SSC stays genuinely compact. You do not sacrifice a full-length quad rail for portability. The SB Tactical SBA3 brace and Timney AXCESS trigger ship pre-installed for immediate use.

Materials & Construction

• Barrel: 12.5″ Cold Hammer Forged, Chrome Moly Vanadium Steel, 1:7″ Twist, Government Profile, Chrome Lined, Mil-Spec Heavy Phosphate Coated, 1/2×28 Threaded Muzzle
• Gas System: Carbine-Length Direct Impingement with Low-Profile Gas Block
• Muzzle Device: Daniel Defense A2 Flash Hider, 1/2×28 Threaded
• Handguard: Free-Floating Daniel Defense GL/SSC RIS II 11.5, Quad Rail with Continuous MIL-STD-1913 Picatinny at the 12, 3, 6 and 9 O’Clock Positions, Integrated M203 Hanger System, Flat Dark Earth
• Trigger: Timney AXCESS Single-Stage Trigger
• Buttstock: SB Tactical SBA3 Pistol Stabilizing Brace on a Pistol-Length Receiver Extension, Five-Position Adjustable

Specifications

This firearm ships from the factory with a pistol stabilizing brace attached to a pistol-length receiver extension, configured as a pistol — not a rifle. A 2024 federal court ruling vacated ATF’s 2023 rule that reclassified braced pistols as Short-Barreled Rifles (SBRs), and the government dropped its appeal of that ruling in 2025. As a result, a stabilizing brace alone no longer causes a pistol to be treated as an SBR under the National Firearms Act (NFA). As configured and shipped, this pistol requires no NFA registration or tax stamp — only the standard ATF Form 4473 background check at transfer. Permanently configuring this firearm with a shoulder stock, however, would create an SBR requiring an approved ATF Form 1 before modification. Western Sport cannot advise on individual compliance — buyers are responsible for following all applicable federal, state, and local law.

Why Buy from Western Sport?

• Western Sport’s expert staff knows Daniel Defense pistols and answers your questions in person.
• We offer competitive pricing on this rare factory reissue configuration.
• Our knowledgeable team provides detailed after-sale support for accessories, optics, and shooting technique.
• We maintain local inventory so you can inspect and handle the firearm before purchase.
• Western Sport stands behind every Daniel Defense sale with honest guidance and fast service.

Frequently Asked Questions

Q: What 5.56 NATO ammunition and magazines work with the DDM4 GL/SSC?

A: The pistol fires both 5.56 NATO and .223 Remington ammunition. Standard AR-pattern magazines load reliably into the magwell. One Daniel Defense magazine ships with your pistol; additional capacity options are available.

Q: What optics, lights, and accessories mount to the RIS II rail?

A: The quad rail accepts any optic or light with MIL-STD-1913 Picatinny mounting. Red dots, magnified optics, tactical lights, and laser devices all secure to the continuous 12/3/6/9 o’clock rail system. The 1/2×28 threaded muzzle accepts common 5.56 suppressors and muzzle devices.

Q: How does the GL/SSC compare to other Daniel Defense pistol configurations?

A: The GL/SSC is unique because its RIS II handguard integrates M203 mounting directly into the rail. This configuration was effectively unobtainable until Daniel Defense released this factory reissue. The integrated approach eliminates adapters and delivers consistent accuracy through a true free-float system.

Q: What is included in the box, and what is the warranty?

A: Your purchase includes the pistol with SB Tactical SBA3 brace and Timney AXCESS trigger pre-installed, one Daniel Defense magazine, and a Daniel Defense impact plastic hard case. Daniel Defense backs every firearm with quality assurance testing and a manufacturer’s warranty against defects.

Q: What is the RIS II rail system on this pistol?

A: The RIS II (Rail Interface System II) is Daniel Defense’s free-float quad-rail handguard, originally developed for USSOCOM’s SOPMOD II program. It carries continuous MIL-STD-1913 Picatinny rails at the 12, 3, 6, and 9 o’clock positions, so lights, lasers, foregrips, iron sights, and optics all mount directly without adapters. Additionally, a 6-bolt bolt-up system locks the rail to the upper receiver for a repeatable zero.

Q: Will I need to file ATF paperwork or pay a tax stamp for this firearm’s brace?

A: No. As configured and shipped, this is a pistol with a stabilizing brace — not a Short-Barreled Rifle (SBR). ATF’s 2023 rule treating braced pistols as SBRs was vacated by federal courts in 2024, and the government dropped its appeal in 2025. Only the standard ATF Form 4473 background check applies at transfer, the same as for any other pistol. Installing a shoulder stock would change that — it would create an SBR and require an approved ATF Form 1 first.

Additional information