SIG SLX556-QD Suppressor
SIG's flagship 5.56 NATO flow-through suppressor, the factory-aligned can for the MCX Spear LT and 5.56 platforms
- Price
- $1,369
- Weight
- 1 lb 3 oz
- Brand
- SIG Sauer
- Category
- Suppressors
Featured in
Features
- •5.56 NATO rated
- •Inconel construction
- •Flow-through baffles
- •Clutch-LOK QD mount
Capability Boosts
Recommended For
Where to Buy
Compare current prices and availability from retailers we work with.
SIG Sauer SLX556-QD 5.56mm Clutch-Lok QD Suppressor, Black
Price History
90-day low $1149.99More rifle guides & articles
Guides
Overview
The SIG SLX556-QD is SIG's 5.56 NATO flow-through suppressor for compatible Clutch-Lok muzzle-device hosts, including many SIG rifle setups. The SLX line was designed around two specific problems traditional baffle 5.56 cans create on short-barrel rifles: blowback through the ejection port and increased gas-driven action speed.
The internal multi-flow-path baffle design vents gas forward through the muzzle rather than back through the action. Construction is Inconel, which is chosen for heat and erosion resistance on hard-use rifle hosts. The trade-off is weight: at 19 oz, the SLX556-QD is heavier than many compact 5.56 cans.
The QD version locks onto SIG's Clutch-Lok QD muzzle devices. SIG builds its 5.56 Clutch-Lok flash hiders and brakes in 1/2x28 with two barrel interfaces: a 90-degree shoulder for standard barrels and a 25-degree taper for SIG Taper-Lok barrels, so match the device to the barrel. A Clutch-Lok QD mount ships in the box.
The SLX556C is a shorter sibling for shooters who prioritize length over absolute sound reduction.
Key Features
- Multi-flow-path baffle design vents gas forward
- Low-tox design reduces blowback vs traditional baffles
- Inconel construction for heat and erosion resistance
- SIG Clutch-Lok QD mount integrates with compatible SIG muzzle devices
- 5.56 NATO rated, supersonic capable
- Compatible with full-auto sustained fire
Pros
- +Lower blowback than many traditional baffle 5.56 cans
- +Inconel core built around supersonic 5.56 use
- +Inconel construction is built for hard-use 5.56 hosts
- +Factory SIG product integrates with MCX, MPX, and broader SIG ecosystem
- +Reduces bolt-carrier velocity vs traditional baffle cans
Cons
- −Heavy for a 5.56 can at 19 oz and 7.4 in
- −Sits in the premium 5.56 price band
- −Inconel construction adds weight forward of the muzzle, affecting balance
- −Clutch-Lok QD is SIG-only, so a non-SIG muzzle device on the rifle has to come off
Detailed Specifications
- Length
- 7.4 inches
- diameter
- 1.67 inches
- weight
- 19 oz
- Material
- Inconel
- Mount Type
- SIG Clutch-LOK QD (1/2x28 Clutch-Lok muzzle devices)
- ratedCalibers
- 5.56 NATO
- fullAutoRated
- Yes
- warranty
- Lifetime
Pairs Well With
Top matches
Similar Products
Compatible Platforms
Compatibility Tags
Build Your Custom Configuration
Add the SIG SLX556-QD Suppressor to your build and see how it enhances your platform.