SIG AMT/PE57/550
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Barrett .50
AR15/M16 FAQs
Bushmaster Armpistol
M96 Expeditionary






Published Articles
Special Sections
AMT FAQ The SIG AMT Rifle in America by Bob Bishop Wanted Information : Doc Wohler Scope Mount
550 FAQ International Arms Review - SG 510 The Craftsmanship of SPS SIG Products
Discussion Board SIG AMT and PE57 Photos from Published Sources AMT Component Pictorial
  StG57 and 510 in Switzerland Adjusting AMT Trigger Let-Off
International Defense Review - SG 550 SIG / Beretta 510 Connection
SIG 550 / 551 Technical Data and Test Documentation Kern Scope
SIG 550 Sniper Rifle by Mark Adkins ATF Materials on the AMT / 550
SIG Precision Rifle SG 550 Sniper - Factory Manual 550 Pictorial
SIG StG90 Swiss Parts Catalog (PDF)
  SIG Assault Rifles SG 550 and 551 Armourer's Instructions  
  Waffen Review Analysis of the 510-4 (in German)  
  SIG PE57 Swiss Parts Catalog (PDF)  



550 (551)
Caliber .308 Winchester (7.62x51 NATO) .223 Remington
Operation Delayed Blowback Gas Operated Rotating Bolt
Overall Length 40 inches 39.3 inches (32.5)
Barrel Length 20 inches 20.8 inches (16.0)
Barrel Type 1-12" Twist, 4 Groove
Feed Device 5, 10, 20 Round Detachable Box Magazine 5, 20, 30 Round Detachable Box Magazine
Sights 100-600 meters - 21" sight radius
Weight 10 lbs 1oz w/bipod 9 lbs (7.7lbs)


SIG Arms
Swiss website
Old Western Scrounger
7.5 Swiss Brass
Fred Fletchers SIG page
550 Series Info and Images
The SIG-Philes SIG Pistol and Rifle Info
Unofficial SIG-Sauer Homepage Covers Pistols and Bolt Actions


Special Thanks to the following fine folks for contributing information and images to the site: Estes Adams, Mark Adkins, Bob Bishop, Peter Keys, and others.


Last Modified on October, 2015