SIG 55x AEG Air Nozzles
The SIG 550 / 551 / 552 / 556 family uses long, platform-specific nozzles, and the exact length varies significantly by brand and model (a King Arms SIG 556, for example, runs a long nozzle around 47.4mm). Because the figure varies so much, the reliable method is to measure the nozzle you are replacing rather than trusting a single quoted length.
Also searched as: SIG 550 nozzle, SIG 551 nozzle, SIG 552 nozzle, SIG 556 nozzle, SG 550 nozzle.
How AEG nozzle fitment works
- AEG air nozzles fit by length, and length is platform-specific: An AEG air nozzle is not universal. It fits your gun by its length in millimetres, and that length is set by your platform: an M4 runs about 21.4mm, an AK about 19.6mm, a G36 about 24.5mm, and long-receiver guns like the SCAR-H run much longer. The internal fit to the cylinder head is broadly shared across standard AEG gearboxes, so the number that actually decides fitment is the length. The reliable method is to measure the nozzle you are replacing and match that, then feed-test.
Fitment notes & exceptions
- Length varies a lot by brand: SIG 55x nozzle length varies widely between brands and models. A King Arms SIG 556 uses a long nozzle around 47.4mm, but other makers differ. Measure the stock nozzle to be sure.
Showing 22 of 22 nozzles

Guarder Air Nozzle for SG550 / SG551 / SG552 AEG

SHS Aluminum O-Ring Air Nozzle | FAL & SIG550: 22.33mm

SHS Air Seal Nozzle for FAL & SIG 550 Series AEG

SHS CNC Aluminum Loading Nozzle for FAL / SIG550 AEG ( SHS-285 )

SHS FAL&SIG550 Aluminum O-ring Air Nozzle
![[SHS] Aluminium Air Seal Nozzle[For FAL/SIG550 Series AEG]](https://cdn.shopify.com/s/files/1/0483/0642/1921/products/SHS_AluminiumAirSealNozzle_ForFALSIG550SeriesAEG.jpg?v=1641985849#p=shs-aluminium-air-seal-nozzle-for-fal-sig550-series-aeg)
[SHS] Aluminium Air Seal Nozzle[For FAL/SIG550 Series AEG]

LONEX Air Seal Nozzle for SIG550 / 551 AEG Series

Nozzle for FAL/SIG550 AEG - 22,35 mm / Aluminum - SHS

Systema Air Seal Nozzle for SG550

Systema Tokyo Marui SIG550 SIG551 SIG552 Air Seal Nozzle

Lonex POM SIG-550 / 551 / 552 Air Nozzle

ULTIMATE Air Nozzle - SIG550/551/552 Series

Classic Army Bore Up Air Nozzle For SIG 550

Guarder Air Seal Nozzle for SIG SG552 Series

King Arms Air Seal Nozzle for SIG552 AEG

Guarder Bore-Up Air Seal Nozzle for SIG SG552 Series
![[Guarder] Air Seal Airsoft Nozzle[For Tokyo Marui SIG 556 AEG Series]](https://cdn.shopify.com/s/files/1/0483/0642/1921/products/Guarder_AirSealAirsoftNozzle_ForTokyoMaruiSIG556AEGSeries.jpg?v=1641986343#p=guarder-air-seal-airsoft-nozzle-for-tokyo-marui-sig-556-aeg-series)
[Guarder] Air Seal Airsoft Nozzle[For Tokyo Marui SIG 556 AEG Series]

Nozzle SIG550/551/552

Hurricane SIG551/552 Air Seal Nozzle

Deep Fire Metal Nozzle for Tokyo Marui SIG 552 Series

Classic Army Air Nozzle For SIG 550

Samoon NPAS Nozzle for GHK GBB 553 Series
Other AEG platforms
AEG air nozzles fit by length, and length is set by your platform. Pick another gun family to see the nozzles that fit its length.
SIG 55x nozzle buying guide
How to pick a SIG 55x nozzle
Identify the exact model and brand, measure the stock nozzle, and match the length. Do not assume an M4 nozzle fits.
Frequently asked questions
What length nozzle does a SIG 556 use?
It varies by brand. A King Arms SIG 556 uses a long nozzle around 47.4mm, but other makers differ, so measure the nozzle you are replacing.
How many SIG 55x nozzles does Airsoft Upgrades track?
We currently track 22 SIG 55x nozzles across 14 retailers, starting at $2.40.