Sig Sauer M400 Forge RM400-556N-16B-FORGE-CA Rifle 5.56 NATO 16" 10+1

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Sig Sauer M400 Forge RM400-556N-16B-FORGE-CA Rifle 5.56 NATO 16" 10+1

UPC 798681744138 from 53 retailers

  • 5.56x45mm
  • Sig Sauer
Shipping:
SIGM400, 5.56 NATO, RIFLE, 16IN, FORGE, BLK, SEMI, ROMEO-MSR GEN II, FIXED, AL MLOK HG, (1) 10RD MAG, CA
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$905.84 DK Gun & Dog ★★★★★ (56)
SIG SAUER M400 FORGE 5.56MM BLK 16" CA
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$999.99 Caliber Exchange ★★★★★ (1)

UPC 798681744138 Price Graph

Today's low is $905.84, 8% below the 180-day average low of $983.28. Over the last 180 days, the lowest price peaked at $999.99 on August 24, 2026 and bottomed at $905.84 on September 6, 2026.

SIG M400 FORGE 5.56 NATO 16" - W/ROMEO-MSR 10RD BLACK CA COMP
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$999.99 Kinetic Armory ★★★★★ (3)
M400 FORGE 5.56 16" Romeo-MSR MLOK Blk 10 CA
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$999.99 Canoe Creek Armory ★★★★★ (17)
M400 FORGE 5.56 16" Romeo-MSR MLOK Blk 10 CA
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$999.99 Cummings Family Firearms ★★★★★ (52)
M400 FORGE 5.56 16" Romeo-MSR MLOK Blk 10 CA
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$999.99 Axolotl Arms ★★★★★ (126)
SIG M400 FORGE 5.56 NATO 16" - W/ROMEO-MSR 10RD BLACK CA COMP
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$999.99 Safe Haven Defense
SIG M400 FORGE 5.56 NATO 16 BLK ROMEO MSR CA
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$999.99 Garrison's Guns ★★★★★ (21)
M400 FORGE 5.56 16" Romeo-MSR MLOK Blk 10 CA
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$999.99 Timber Hole Outdoors ★★★★★ (5)
Sig Sauer M400 FORGE AR 16" 556NATO 10 Rounds - Black
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$999.99 Skid Tactical ★★★★★ (63)

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Sig Sauer M400 Forge Black Rifle 5.56 NATO 10rd Magazine 16" Barrel ROMEO-MSR GEN II Adjustable Stock M-LOK Handguard CA Compliant
Free Shipping $15 Off Orders Over $75 Code CALIBERKING
$999.99 Brickhouse Firearms
Sig Sauer RM400556N16BFORGECA M400 Forge *CA Compliant 5.56 NATO 10+1 16" Black Anodized Alloy Receiver w/Picatinny Rail, M-LOK Handguard, Magpul MOE Black Polymer Stock, Shark Fin Grip, Sig ROMEO MSR
Free Shipping CC Fee 3%
$999.99 Minutemen Defense ★★★★★ (54)
SIG M400 FORGE 5.56 NATO 16 BLK ROMEO MSR CA
Free Shipping CC Fee 3% $10 Off Code CALIBERKING
$999.99 Armed in Michigan ★★★★★ (714)
Sig Sauer M400 Forge CA 5.56 NATO 16in AR Rifle with ROMEO-MSR Red Dot
Shipping $10
$999.99 Alexander's Store ★★★★★ (1,532)
SIG SAUER M400 FORGE 5.56MM BLK 16" CA
Shipping $15
$999.99 AZ Arms Depot ★★★★★ (229)
M400 FORGE 5.56 16" Romeo-MSR MLOK Blk 10 CA
Shipping $16
$999.99 Riflenetics ★★★★★ (65)
Sig Sauer M400 Forge RM400-556N-16B-FORGE-CA Rifle 5.56 NATO 16" 10+1 Semi-Auto ROMEO-MSR Gen II Red Dot
Shipping $18
$999.99 Classic Firearms ★★★★★ (2,454)
Sig Sauer RM400556N16BFORGECA M400 Forge *CA Compliant 5.56 NATO 10+1 16" Black Anodized Alloy Receiver w/Picatinny Rail, M-LOK Handguard, Magpul MOE Black Polymer Stock, Shark Fin Grip, Sig ROMEO MSR
Shipping $18
$999.99 Sharp's Shooting Supply ★★★★★ (34)
M400 FORGE 5.56 16" Romeo-MSR MLOK Blk 10 CA
Shipping $20 Free Shipping > $1,000
$999.99 Life2A ★★★★★ (3)
Sig Sauer RM400556N16BFORGECA M400 Forge *CA Compliant 5.56 NATO 10+1 16" Black Anodized Alloy Receiver w/Picatinny Rail, M-LOK Handguard, Magpul MOE Black Polymer Stock, Shark Fin Grip, Sig ROMEO MSR
Shipping $20
$999.99 Custom Creatives Group ★★★★★ (24)
SIG M400 FORGE 5.56 NATO 16" - W/ROMEO-MSR 10RD BLACK CA COMP
Shipping $25 $25 Off Orders Over $200 Code LOCKNLOAD25
$999.99 Scottsodg.com
SIG M400 FORGE 5.56 NATO 16" - W/ROMEO-MSR 10RD BLACK CA COMP
$5 Off - Use Code CALIBERKING
$999.99 Gun Place ★★★★★ (206)
M400 FORGE 5.56 16" Romeo-MSR MLOK Blk 10 CA
Free Shipping > $1,250
$999.99 Nadir Solutions ★★★★★ (18)
M400 FORGE 5.56 16" Romeo-MSR MLOK Blk 10 CA
Free Shipping > $1,000 CC Fee 3%
$999.99 Bunker Hill Ballistics ★★★★★ (9)
Sig Sauer M400 Forge 5.56 NATO 16in w/ ROMEO-MSR Gen II (10rd CA)
$999.99 Georgia Guns & Ammo ★★★★★ (2)
SIG SAUER M400 FORGE 5.56MM BLK 16" CA
$999.99 Armored Boar Gunworks ★★★★★ (53)
M400 FORGE 5.56 16" Romeo-MSR MLOK Blk 10 CA
$999.99 Allied Arms ★★★★★ (310)
SIGM400, 5.56 NATO, RIFLE, 16IN, FORGE, BLK, SEMI, ROMEO-MSR GEN II, FIXED, AL MLOK HG, (1) 10RD MAG, CA
Add to Cart for Price
$999.99 Gun Wise
SIG M400 FORGE 5.56 NATO 16" - W/ROMEO-MSR 10RD BLACK CA COMP
$999.99 Tungsten Creek Tactical
SIG M400 FORGE 5.56 NATO 16" - W/ROMEO-MSR 10RD BLACK CA COMP
$999.99 Black Bayou Armory ★★★★★ (83)
Sig Sauer M400 Forge Black Rifle 5.56 NATO 10rd Magazine 16" Barrel ROMEO-MSR GEN II Adjustable Stock M-LOK Handguard CA Compliant
$999.99 Pickett's Mill Armory ★★★★★ (26)
Sig Sauer M400 Forge Black Rifle 5.56 NATO 10rd Magazine 16" Barrel ROMEO-MSR GEN II Adjustable Stock M-LOK Handguard CA Compliant
$999.99 MCM Tactical ★★★★★ (60)
M400 FORGE 5.56 16" Romeo-MSR MLOK Blk 10 CA
$999.99 CLB Guns ★★★★★ (45)
M400 Forge 5.56 Semi-Auto Rifle W/Romeo-Msr Gen Ii Ca Compliant - M400 Forge 5.56 16"bbl (1)10rd W/Romeo-Msr Gen Ii Ca Comp
$999.99 Brownells ★★★★★ (737)
Sig Sauer M400 Forge Black Rifle 5.56 NATO 10rd Magazine 16" Barrel ROMEO-MSR GEN II Adjustable Stock M-LOK Handguard CA Compliant
$999.99 Get Guns N Ammo
SIG M400 FORGE 5.56 NATO 16 BLK ROMEO MSR CA
$999.99 WTW Arms ★★★★★ (68)
SIG M400 FORGE 5.56 NATO 16 BLK ROMEO MSR CA
$999.99 Highland Arms ★★★★★ (49)
SIG M400 FORGE 5.56 NATO 16" - W/ROMEO-MSR 10RD BLACK CA COMP
$999.99 Big Bee Bee ★★★★★ (11)
SIG M400 FORGE 5.56 NATO 16" - W/ROMEO-MSR 10RD BLACK CA COMP
$999.99 Birmingham Hill Armory ★★★★★ (16)
Sig M400 Forge 5.56 NATO 16 BLK Romeo Msr Ca
$999.99 Shiner Tactical ★★★★★ (6)
SIG M400 Forge 5.56 NATO AR Rifle with Romeo MSR
$999.99 Good 4 Guns ★★★★★ (276)
Sig Sauer M400 Forge Black Rifle 5.56 NATO 10rd Magazine 16" Barrel ROMEO-MSR GEN II Adjustable Stock M-LOK Handguard CA Compliant
$1,010.00 Third Shift
M400 FORGE 5.56 16" Romeo-MSR MLOK Blk 10 CA
Shipping $20
$1,010.36 Down Range Firearms ★★★★★ (8)
Sig Sauer M400 FORGE 5.56 16" Romeo-MSR MLOK Blk 10 CA
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$1,032.99 BuyAGun ★★★★★ (3)
SIG M400 FORGE 5.56 NATO 16 BLK ROMEO MSR CA
$1,034.99 2 If By Sea Tactical ★★★★★ (135)
M400 FORGE 5.56 16" Romeo-MSR MLOK Blk 10 CA
$1,043.61 Redsand Tactical
SIG M400 FORGE 5.56 NATO 16" - W/ROMEO-MSR 10RD BLACK CA COMP
$1,045.20 Firearms Express
Sig Sauer M400 Forge 798681744138 5.56 mm NATO
$1,047.99 C-ME Firearms
Sig Sauer M400 Forge 798681744138 5.56 mm NATO
$1,051.99 Denver Bullets ★★★★★ (95)
M400 FORGE 5.56 16" Romeo-MSR MLOK Blk 10 CA
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$1,061.99 Timberlake Firearms ★★★★★ (11)
SIG M400 FORGE 5.56 NATO 16" - W/ROMEO-MSR 10RD BLACK CA COMP
$1,122.99 Coastal Firearms
Sig Sauer M400 Forge Black Rifle 5.56 NATO 10rd Magazine 16" Barrel ROMEO-MSR GEN II Adjustable Stock M-LOK Handguard CA Compliant
$1,122.99 Apocalypse Outfitters ★★★★★ (4)
M400 FORGE 5.56 16" Romeo-MSR MLOK Blk 10 CA
$1,187.22 Bulletproof Outfitters ★★★★★ (133)

UPC 798681744138 Price Graph

Today's low is $905.84, 8% below the 180-day average low of $983.28. Over the last 180 days, the lowest price peaked at $999.99 on August 24, 2026 and bottomed at $905.84 on September 6, 2026.

Daily Deals Email

Products at their 90-day low price.

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