LMT Modular Ambidextrous Rifle System vs SIG SG 550

ASmall arms

LMT Modular Ambidextrous Rifle System

Assault rifle Battle rifle

SIG SG 550 — licensed reference photograph

BSmall arms

SIG SG 550

Assault rifle Carbine Battle rifle Designated marksman rifle Semi-automatic rifle

Credit

No machine-readable author provided. Rama assumed (based on copyright claims). · CC BY-SA 3.0 · Resized · CC BY-SA 3.0 · Source ↗ · Modified

First system

Second system

At a glance

Side by side

Length comparisonOne shared metre scale

LMT Modular Ambidextrous Rifle SystemLMT Modular Ambidextrous Rifle System · Length · "Maximum"

0.914 m

Length source ↗

SIG SG 550stock extended

1 m

Length source ↗

Lengths retain their source configuration and measurement scope.

Measured figures

Head to head

11 of 27 rows sourced on both sides

914mm

1mstock extended

LengthScopes differ

All recorded figures & sources

0.914 m

LMT Modular Ambidextrous Rifle System · Length · "Maximum"

Single source

914 mm (36.0 in) ("Maximum")^[source]LMT Modular Ambidextrous Rifle System · Length

1 m

stock extended

Single source

0.772 m

stock folded

Single source

1,000 mm (39.4 in) (stock extended) 772 mm (30.4 in) (stock folded)^[source]

3.3kg

4.1kg

Mass

All recorded figures & sources

3.3 kg

LMT Modular Ambidextrous Rifle System · Mass · Empty

Single source

3.3kg (empty)^[source]LMT Modular Ambidextrous Rifle System · Mass

4.1 kg

Mass

Single source

4.1 kg (9.04 lb)^[source]

—

0.1–0.4kmEffective; sight adjustments

Range

All recorded figures & sources

0.1–0.4 km

Effective; sight adjustments

Single source

100–400 m sight adjustments^[source]

457mm

528mm

Barrel length

All recorded figures & sources

0.457 m

L129A2 exact named variant; not a sibling record · Barrel length

Single source

0.406 m

Stgw 25 exact named variant; not a sibling record · Barrel length

Single source

0.305 m

Stgw 25K exact named variant; not a sibling record · Barrel length

Single source

18 in (457 mm)^[source]L129A2 exact named variant; not a sibling record

16 in (406 mm)^[source]Stgw 25 exact named variant; not a sibling record

12 in (305 mm)^[source]Stgw 25K exact named variant; not a sibling record

0.528 m

Barrel length

Single source

528 mm (20.8 in)^[source]

—

700rpmc

Rate of fire

All recorded figures & sources

700 rounds/min

Single source

c. 700 rounds/min^[source]

—

911m/s

Muzzle velocity

All recorded figures & sources

911 m/s

Muzzle velocity

Single source

911 m/s (2,989 ft/s)^[source]

Bars compare reported quantities only. A larger figure does not make a system better; configurations and test conditions differ.

Configuration

Details

LMT Modular Ambidextrous Rifle System and SIG SG 550 configuration
Specification	LMT Modular Ambidextrous Rifle System	SIG SG 550
Type	Assault rifle Battle rifle^[source]LMT Modular Ambidextrous Rifle System · Type	Assault rifle Carbine Battle rifle Designated marksman rifle Semi-automatic rifle^[source]
Place of origin	United States^[source]LMT Modular Ambidextrous Rifle System · Place of origin	Switzerland^[source]
In service	2015 - present^[source]LMT Modular Ambidextrous Rifle System · In service	1990–present^[source]
Designer	Lewis Machine & Tool Company^[source]LMT Modular Ambidextrous Rifle System · Designer	Schweizerische Industrie Gesellschaft^[source]
Manufacturer	Lewis Machine & Tool Company^[source]LMT Modular Ambidextrous Rifle System · Manufacturer	SIG Sauer AG (formerly Schweizerische Industrie Gesellschaft and Swiss Arms)^[source]
Cartridge	5.56×45mm NATO 7.62×51mm NATO 6.5mm Creedmoor^[source]LMT Modular Ambidextrous Rifle System · Cartridge The MARS-L (light) assault rifle variants are chambered for the 5.56×45mm NATO intermediate cartridge , and the MARS-H (heavy) battle rifle and designated marksman rifle variants for the 7.62×51mm NATO , 6.5 mm Creedmoor or similar fully powered cartridges .^[source]Design · explicit MARS-L/MARS-H cartridge scope MARS-H based designated marksman variant, chambered in 6.5 mm Creedmoor .^[source]L129A2 · explicit MARS-L/MARS-H cartridge scope Swiss MARS-H-based designated marksman rifle chambered in 7.62×51mm NATO.^[source]7.62mm Zf Stgw 20 · explicit MARS-L/MARS-H cartridge scope LMT's MRGG-A is a member of its Modular Ambidextrous Rifle System-Heavy (MARS-H) family, which are commonly described as AR-10-style rifles, but is chambered to fire the 6.5mm Creedmoor round.^[source]MK24 Mid-Range Gas Gun-Assault · explicit MARS-L/MARS-H cartridge scope	5.56×45mm NATO 7.62×39mm (SG 553R, SG 556R & SIG563R) .300 AAC Blackout (SG 553 BK and SIG563 BK) 6.5mm Creedmoor (SG 750) 7.62×51mm NATO (SG 750 and SG 751)^[source]
Action	Gas-operated , rotating bolt (internal piston, not direct impingement ) or Short-stroke piston^[source]LMT Modular Ambidextrous Rifle System · Action	Gas operated , rotating bolt^[source]
Feed system	5.56×45mm NATO : 30-round detachable box magazine 7.62×51mm NATO 20-round detachable box magazine^[source]LMT Modular Ambidextrous Rifle System · Feed system	Proprietary 10-, 20-, 30-round box magazines (SG 550 series & SG 560 series) STANAG magazines (SIG 556 series, SG 560 series, SG 550 series (with STANAG mag well)) AKM -pattern magazines (SG 553R, SG 556R) SG 750 series magazines (SG 750 and SG 751)^[source]
Used by	—	See Users^[source]
Wars	—	War in Afghanistan (2001–2021) Sinai insurgency 2013 Lahad Datu standoff Yemeni Civil War (2014–present)^[source]
Designed	—	1970s–1980s^[source]
Produced	—	1986–present^[source]
No. built	—	600,000^[source]
Variants	—	See Variants^[source]
Sights	—	Rear: rotating diopter drum with tritium night inserts ; front: hooded post with folding night post 540 mm (21.3 in) sight radius (SG 550)^[source]
Reported operators	Reported operator · Estonia Reported operator · Lebanon Reported operator · New Zealand Reported operator · Switzerland Reported operator · United Kingdom Reported operator · United States	—

FORCETALLY

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LMT Modular Ambidextrous Rifle System

SIG SG 550

Type

Assault rifle Battle rifle^[source]LMT Modular Ambidextrous Rifle System · Type

Assault rifle Carbine Battle rifle Designated marksman rifle Semi-automatic rifle^[source]

Place of origin

United States^[source]LMT Modular Ambidextrous Rifle System · Place of origin

Switzerland^[source]

In service

2015 - present^[source]LMT Modular Ambidextrous Rifle System · In service

1990–present^[source]

Designer

Lewis Machine & Tool Company^[source]LMT Modular Ambidextrous Rifle System · Designer

Schweizerische Industrie Gesellschaft^[source]

Manufacturer

Lewis Machine & Tool Company^[source]LMT Modular Ambidextrous Rifle System · Manufacturer

SIG Sauer AG (formerly Schweizerische Industrie Gesellschaft and Swiss Arms)^[source]

Cartridge

5.56×45mm NATO 7.62×51mm NATO 6.5mm Creedmoor^[source]LMT Modular Ambidextrous Rifle System · Cartridge

The MARS-L (light) assault rifle variants are chambered for the 5.56×45mm NATO intermediate cartridge , and the MARS-H (heavy) battle rifle and designated marksman rifle variants for the 7.62×51mm NATO , 6.5 mm Creedmoor or similar fully powered cartridges .^[source]Design · explicit MARS-L/MARS-H cartridge scope

MARS-H based designated marksman variant, chambered in 6.5 mm Creedmoor .^[source]L129A2 · explicit MARS-L/MARS-H cartridge scope

Swiss MARS-H-based designated marksman rifle chambered in 7.62×51mm NATO.^[source]7.62mm Zf Stgw 20 · explicit MARS-L/MARS-H cartridge scope

LMT's MRGG-A is a member of its Modular Ambidextrous Rifle System-Heavy (MARS-H) family, which are commonly described as AR-10-style rifles, but is chambered to fire the 6.5mm Creedmoor round.^[source]MK24 Mid-Range Gas Gun-Assault · explicit MARS-L/MARS-H cartridge scope

5.56×45mm NATO 7.62×39mm (SG 553R, SG 556R & SIG563R) .300 AAC Blackout (SG 553 BK and SIG563 BK) 6.5mm Creedmoor (SG 750) 7.62×51mm NATO (SG 750 and SG 751)^[source]

Action

Gas-operated , rotating bolt (internal piston, not direct impingement ) or Short-stroke piston^[source]LMT Modular Ambidextrous Rifle System · Action

Gas operated , rotating bolt^[source]

Feed system

5.56×45mm NATO : 30-round detachable box magazine 7.62×51mm NATO 20-round detachable box magazine^[source]LMT Modular Ambidextrous Rifle System · Feed system

Proprietary 10-, 20-, 30-round box magazines (SG 550 series & SG 560 series) STANAG magazines (SIG 556 series, SG 560 series, SG 550 series (with STANAG mag well)) AKM -pattern magazines (SG 553R, SG 556R) SG 750 series magazines (SG 750 and SG 751)^[source]

Used by

—

See Users^[source]

Wars

—

War in Afghanistan (2001–2021) Sinai insurgency 2013 Lahad Datu standoff Yemeni Civil War (2014–present)^[source]

Designed

—

1970s–1980s^[source]

Produced

—

1986–present^[source]

No. built

—

600,000^[source]

Variants

—

See Variants^[source]

Sights

—

Rear: rotating diopter drum with tritium night inserts ; front: hooded post with folding night post 540 mm (21.3 in) sight radius (SG 550)^[source]

Reported operators

Reported operator · Estonia
Reported operator · Lebanon
Reported operator · New Zealand
Reported operator · Switzerland
Reported operator · United Kingdom
Reported operator · United States

—