Daniel Defense
Daniel Defense SG-556
Low-gas stainless 5.56 suppressor with HUB mounting and a low-$700 street price, offset by a 22 oz body
Quick Specs
- Price
- $773
- Weight
- 1 lb 6 oz
- Brand
- Daniel Defense
- Category
- suppressor
Features
- •5.56 NATO / .223 Rem
- •7 in long / 1.75 in diameter
- •22 oz published weight
- •HUB 1.375x24 with 1/2x28 adapter
- •TBAC 2023 Summit data
Capability Boosts
Recommended For
+11 more
Compatibility Tags
Overview
The Daniel Defense SG-556 earns attention on price and gas control, not handling. Daniel Defense builds the 7-inch, 1.75-inch can from stainless steel and includes a 1/2x28 direct-thread adapter that attaches through the standard HUB 1.375x24 rear interface. That gives a buyer a usable mount in the box and leaves the door open for a different HUB-compatible system later.
The cost is weight. Daniel Defense's launch specification lists 22 oz, and the 2023 TBAC Silencer Summit measured the complete tested assembly at 23.89 oz and 7.215 inches. That is a major penalty at the muzzle of an 11.5-inch rifle. TBAC recorded 143.70 dBA mil-spec-left peak average and 128.28 dBA shooter-ear LEQ on its shared 5.56 test host. An independent review also reported low blowback and almost no visible flash, but it did not meter sound.
Buy the SG-556 for a fixed rifle where low gas, stainless construction, HUB flexibility, and price matter more than front-end weight. Skip it for a rifle carried for hours or any build already fighting a heavy rail, light, and laser stack.
Key Features
- 7-inch stainless tube and baffle stack
- 1.75-inch diameter
- 22 oz published weight
- HUB 1.375x24 rear interface
- Included 1/2x28 direct-thread adapter
- 2023 TBAC Silencer Summit sound and physical measurements
- Daniel Defense satisfaction guarantee
Pros
- +Keeps gas at the shooter low enough to make an untuned AR more pleasant
- +HUB rear threads let you change mounting systems instead of replacing the suppressor
- +The included 1/2x28 adapter puts it on a standard 5.56 barrel without another purchase
- +Stainless construction suits a rifle that will see regular strings of fire
- +Street pricing in the low $700s undercuts most premium low-gas 5.56 cans
Cons
- −The 22 oz published weight makes a short rifle feel dramatically more nose-heavy
- −A 7-inch body is long for a dedicated 5.56 suppressor
- −Independent testing measured the complete assembly at 23.89 oz
- −No PEW Science rating or current independent flash comparison
- −The 1.75-inch diameter can crowd tight handguards and low-mounted accessories
Detailed Specifications
- partNumber
- 06-140-04249
- Length
- 7 inches official; 7.215 inches as tested by TBAC
- diameter
- 1.75 inches
- weight
- 22 oz published; 23.89 oz complete assembly as tested by TBAC
- Material
- Stainless steel tube and baffle stack
- Mount Type
- HUB 1.375x24 rear interface with included 1/2x28 direct-thread adapter
- ratedCalibers
- 5.56 NATO / .223 Rem
- soundReduction
- TBAC 2023 Summit: 143.70 dBA mil-spec-left peak average, 128.28 dBA shooter-ear LEQ
- warranty
- Daniel Defense satisfaction guarantee
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Add the Daniel Defense SG-556 to your build and see how it enhances your platform.