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Overview[]

The SIG SG 553 is a Swiss assault carbine.

Variants[]

SG 550 "Stgw. 90 / F. ass. 90 5.56mm"
Standard full-length production model from 1986, being adopted in 1990.
SG 550 SR
Sniper version of the SG 550 with different stock and long barrel.
SG 550-1
Improved iteration of the SG 550 SR, designed specifically for law enforcement units. Features a unique two-stage trigger pull, and a adjustable folding stock with a riser and butt-pad spacer. No longer in production.
SG 551
Carbine version of the SG 550.
SG 551-A1
..?
SG 551-P
Police version of the SG 551, produced with a Hensoldt 6x42 BL sight and a special cheek riser.
SG 551 SWAT
Further developed model of the SG 551, featuring a modular rail interface and railed handguard.
SG 551 LB
Long barreled SG 551, with a 17.9 inch barrel. This allows for the use of a bayonet or grenade launcher device.
SG 551-2 SP SWAT
..?
SG 552
A "improved" SG 551 which features a further shortened 8.9 inch barrel, and a newer handguard which is ventilated.
SG 552-A1
Essentially a conversion for the SG 552 which converts the internals to those of the improved SG 553 model.
SG 552-2
..?
SG 552 LB
Long barreled SG 552, with a 13.6 inch barrel. This allows for the use of a bayonet or grenade launcher.
SG 553
A "further improved" SG 552, that incorporates the recoil spring wrapped around the piston rod. This purportedly counters various reliability issues experienced on previous SG 552 models.
SG 553 LB
Long barreled SG 553, with a 13.6 inch barrel. This allows for the use of a bayonet of grenade launcher.
SG 553 SB
..?
SG 553 R
A rechambering which converts a standard SG 553 to feed from 7,62x39mm AK compatible magazines. Primarily aimed the Russian civilian market, and is thus semi-automatic only.

Derivatives

SG 750
Marksman rifle model chambered in 7.62x51mm.
SIG Arms AG / SAN Swiss Arms AG / SIG Sauer AG
Firearms Swiss Arms
See also: SIG Sauer, Inc.
Grenade Launchers GL 5040GL 5140
Machine Guns KE7MG50
Military Rifles SG 510SG 540SG 542SG 543SG 550SG 551SG 552SG 553SG 556
Pistols ChylewskiP210
Sniper Rifles SG 511SG 550 SRSG 556 DMR
Submachine Guns Bergmann 1920MKMSMP-48MP-310
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Primary Weapons Assault Rifle SG 510-3SG 530 (-1)SG 540SG 541SG 542SG 543Stgw 47Stgw 49Stgw 50Stgw 51Stgw 52Stgw 70Stgw 71Stgw 74-75Stgw 78
Battle Rifle AK 53 (7.5mm7.62mm)AM 55SG 510 -1-2-4-5-6)Stgw 54Stgw 55Stgw 56Stgw 57Stgw 70
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