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SIG SG 542 (Sturmgewehr Model 542)

Battle Rifle

SIG SG 542 (Sturmgewehr Model 542)

Battle Rifle

OVERVIEW
SPECIFICATIONS
VARIANTS
HISTORY
MEDIA
OVERVIEW



The SG 542 represented a less-popular 7.62x51mm alternative to the SG 540 5.56mm SG offering.
National Flag Graphic
ORIGIN: Switzerland
YEAR: 1980
MANUFACTURER(S): SIG-Sauer - Switzerland
OPERATORS: Switzerland; France
SPECIFICATIONS



Common measurements, and their respective conversions, are shown when possible. Calibers listed may be model/chambering dependent.
ACTION: Delayed Blowback
CALIBER(S): 7.62x51mm NATO
LENGTH (OVERALL): 1,000 millimeters (39.37 inches)
WEIGHT (UNLOADED): 7.83 pounds (3.55 kilograms)
SIGHTS: Adjustable Iron; Optional Optics
MUZZLE VELOCITY: 2,690 feet-per-second (820 meters-per-second)
RATE-OF-FIRE: 650 rounds-per-minute
VARIANTS



Series Model Variants
• SG 540 - Improved SG 530, chambered for the 5.56mm ammunition round.
• SG 542 - Based on the SG 540 but chambered for the 7.62x51mm NATO round.
• SG 543 - A shortened version of the base SG 540 with folding butt.


HISTORY



Detailing the development and operational history of the SIG SG 542 (Sturmgewehr Model 542) Battle Rifle.  Entry last updated on 10/13/2016. Authored by Staff Writer. Content ©www.MilitaryFactory.com.
The SG 542 was a fixed-stock battle rifle development in the SG 540 rifle series except chambered to fire the 7.62x51mm NATO round. Though an adequate weapon in its own right, the system never found the favor in export orders the way that the SG540 5.56mm type did. The SG540 series, as a whole, was a direct attempt to improve upon the preceding SG530, simplifying the breech mechanism and making the new weapon series cheaper to produce and thusly more fiscally responsible on the commercial market.

The SG542 fired from a 20- or 30-round straight detachable box magazines. Muzzle velocity was reported at 2,690 feet-per-second and a cyclic rate-of-fire of 650 to 800 rounds could be reached. Beyond the SG540 and the SG 542 existed the SG 543 which represented a shortened version of the base SG 540 and featured a folding butt.

Outwardly, the SG542 was a highly conventional rifle. As a "battle rifle" it simply incorporated the rifle-caliber cartridge into its design and, thusly, the internal mechanism had to be reworked to accept and fire the large powerful round. The cartridge allowed for engagement of targets beyond the range inherent in the 5.56mm cartridge while also providing selective, repeating fire in the process. Attaching a scope to the upper receiver and the SG542 could be used by a squad-level sharpshooter or designated marksman. The receiver held all of the major internal working components and included the feed mechanism as well as the trigger group. The forend was shrouded in a smooth casing which encompasses the top-mounted gas cylinder and the low-mounted barrel assembly. Sights were affixed at the rear of the upper receiver and the extreme end of the gas cylinder. The barrel was capped by a flash suppressor. The stock was fixed in placed and ergonomically shaped.




MEDIA