SIG 556
$266.52
- SKUFSS556
- UPC
- BrandBlueguns
Discontinued
Description
Highlights:
The SIG 556 is a versatile, gas-operated rifle that blends the legendary Swiss SIG SG 550 series internal mechanism with the ergonomics and magazine compatibility of the American AR-15/M4 platform. It was designed to provide the extreme reliability of a long-stroke piston system to the North American commercial and law enforcement markets.
Core Engineering Features
Long-Stroke Gas Piston System: Derived from the SIG SG 550 and the AK-47, this system is renowned for its durability and ability to cycle in the most adverse conditions. The heavy piston and rod move as a single unit with the bolt carrier, providing high momentum and reliable extraction.
Two-Position Adjustable Gas Block: Allows the operator to switch between a "Normal" setting for standard use and an "Adverse" setting to increase gas flow when the rifle is heavily fouled or operating in extreme cold.
AR-15 Magazine Compatibility: Unlike the original Swiss 550 series which used proprietary translucent magazines, the 556 utilizes a standard AR-15/M4 magazine well, allowing the use of widely available STANAG magazines (e.g., PMAGs).
Cold Hammer-Forged Barrel: High-quality steel barrels designed for longevity and precision. Many variants feature a 1:7" twist rate to stabilize heavier, duty-grade 5.56mm projectiles.
Included:
SIG 556
The SIG 556 is a versatile, gas-operated rifle that blends the legendary Swiss SIG SG 550 series internal mechanism with the ergonomics and magazine compatibility of the American AR-15/M4 platform. It was designed to provide the extreme reliability of a long-stroke piston system to the North American commercial and law enforcement markets.
Core Engineering Features
Long-Stroke Gas Piston System: Derived from the SIG SG 550 and the AK-47, this system is renowned for its durability and ability to cycle in the most adverse conditions. The heavy piston and rod move as a single unit with the bolt carrier, providing high momentum and reliable extraction.
Two-Position Adjustable Gas Block: Allows the operator to switch between a "Normal" setting for standard use and an "Adverse" setting to increase gas flow when the rifle is heavily fouled or operating in extreme cold.
AR-15 Magazine Compatibility: Unlike the original Swiss 550 series which used proprietary translucent magazines, the 556 utilizes a standard AR-15/M4 magazine well, allowing the use of widely available STANAG magazines (e.g., PMAGs).
Cold Hammer-Forged Barrel: High-quality steel barrels designed for longevity and precision. Many variants feature a 1:7" twist rate to stabilize heavier, duty-grade 5.56mm projectiles.
Included:
SIG 556