SIG Sauer Suppressors
SIG Sauer SRD556
Specs, variants & prices
SIG Sauer has discontinued the SRD556 suppressor, but still lists one version on its site, rated for 5.56 NATO. It is 6.4" long. SIG Sauer's suggested retail price is $605, and stores set their own prices from there.
What versions of the SIG Sauer SRD556 are there?
0 current and 1 discontinued version. Specs and measurements are SIG Sauer's own.
SRD556
—- Model / part #
- SRD556
- Caliber
- 5.56 NATO
- Diameter
- 1.625"
- Attachment
- Direct Thread
- Threads
- 1/2 in - 28 tpi
- Overall length
- 6.4"
- Weight
- 14.5 oz
- Finish
- Inconel 718 / Stainless Steel
- MSRP
- $605
- Status
- Discontinued
What calibers is the SRD556 rated for?
It's rated for 5.56 NATO.
How much does a SIG Sauer SRD556 cost?
SIG Sauer's suggested retail price is $605.
Can you buy one in California or Massachusetts?
SIG Sauer leaves California and Massachusetts blank for this suppressor. A dealer can transfer one only where that state allows suppressors. State rules change, so check our California and Massachusetts pages before you buy.
What's the latest on the SRD556?
Nothing new on the SRD556 lately.
Specs from SIG Sauer, checked June 3, 2026 (source). SIG Sauer's site blocks scripted requests, so this table was read from a saved copy of the product page. Spot a mistake? Let us know and we'll fix it. SIG Sauer is a trademark of its owner, listed for identification only. Firearms Almanac isn't affiliated with SIG Sauer.