Sig Sauer AR-15 Parts & Accessories
SIG Sauer is the New Hampshire gun maker behind the Army's M17 pistol and the MCX rifle, with Swiss roots going back to 1853. AR builders mostly see them for Romeo red dots, Tango and Sierra scopes, and ammo.
Sig Sauer was established in 1985.
Market positioning: Duty / Professional.
Sig Sauer has 1330 products available on GunPartPicker, ranging from $7.99 to $4499.99.
Sig Sauer Product Categories
- Optic: 254 products
- Rifle Scope: 153 products
- Optic Mount: 82 products
- 9mm: 65 products
- Magazine: 58 products
- Suppressor: 51 products
- Complete Rifle: 47 products
- Glock Magazine: 46 products
- .40 S&W: 43 products
- Barrel: 34 products
- Magnifier: 32 products
- .300 Blackout: 31 products
- Muzzle Device: 30 products
- .30-06 Springfield: 30 products
- Ammunition: 29 products
- .45 ACP: 28 products
- .308 Win: 25 products
- 6.5 Creedmoor: 21 products
- .270 Win: 19 products
- .380 ACP: 18 products
- .300 Win Mag: 18 products
- .243 Win: 16 products
- 10mm Auto: 14 products
- Light: 11 products
- 7mm Rem Mag: 11 products
- Buffer Spring: 11 products
- Night Vision & Thermal: 11 products
- Handguard: 10 products
- Iron Sights: 10 products
- .357 SIG: 9 products
- .223 Rem: 9 products
- 5.56 NATO: 9 products
- Magazine Release: 8 products
- Glock Optic Plate: 8 products
- Trigger: 7 products
- Upper Receiver: 7 products
- Laser: 6 products
- Foregrip: 6 products
- .38 Special: 6 products
- 6mm Creedmoor: 6 products
- Stock & Brace: 5 products
- .357 Magnum: 4 products
- .22-250 Rem: 4 products
- Glock Holster: 4 products
- Charging Handle: 4 products
- Gas Block: 2 products
- Rear Sight: 2 products
- Dust Cover: 2 products
- Stock Adapter: 2 products
- Sling: 1 product
- Bipod: 1 product
- Safety: 1 product
- Gas Tube: 1 product
- .38 Super: 1 product
- Bolt Catch: 1 product
- .44 Magnum: 1 product
- Pistol Grip: 1 product
- Front Sight: 1 product
- Bipod Mount: 1 product
- Forward Assist: 1 product
- Bolt Carrier Group: 1 product
Stock status: 620 in stock, 710 out of stock.
1-16 of 47 results
1-16 of 47 results
Sig Sauer
Sig Sauer RM400SDI16BP M400 X-Series 16" 30+1, Black, Magpul SL-K Stock, OEM Polymer Grip, Flat Match Trigger
Platform: AR-15
Caliber: 5.56 NATO
Barrel Length: 16.0
Gas System Length: Mid-Length
Platform
AR-15
Caliber
5.56 NATO
Barrel Length
16.0
Gas System Length
Mid-Length
$1,500$1,500
In Stock$1,500$1,500
In Stock
Sig Sauer
SIG SAUER 516 G3 5.56mm NATO 16in 30rd Semi-Auto Rifle (R516G3-556N-16B)
Platform: AR-15
Caliber: 5.56 NATO
Compliance: Standard
Barrel Length: 16.0
Gas System Length: Mid-Length
Platform
AR-15
Caliber
5.56 NATO
Compliance
Standard
Barrel Length
16.0
Gas System Length
Mid-Length
$2,000$2,000
In Stock$2,000$2,000
In Stock
Sig Sauer
Sig Sauer MCX Spear 5.56 NATO AR-15 Pistol 11.5" 30rd, Coyote - PMCX-556N-11B-IR
Platform: AR-15
Caliber: 5.56 NATO
Compliance: Standard
Barrel Length: 11.5
Gas System Length: Carbine
Platform
AR-15
Caliber
5.56 NATO
Compliance
Standard
Barrel Length
11.5
Gas System Length
Carbine
$2,500$2,500
In Stock$2,500$2,500
In Stock
Sig Sauer
SIG SAUER M400 TREAD V2 5.56MM 16" V2 BLACK RIFLE
Platform: AR-15
Caliber: 5.56 NATO
Compliance: Standard
Barrel Length: 16.0
Gas System Length: Mid-Length
Platform
AR-15
Caliber
5.56 NATO
Compliance
Standard
Barrel Length
16.0
Gas System Length
Mid-Length
$878$878
In Stock$878$878
In Stock
Sig Sauer
Sig Sauer M400 Rose RM400-16B-ROSE-R5X2-10 Rifle, 5.56 NATO, 16" Barrel, 10+1, Semi-Auto, Romeo5 GenII, Rose Gold Controls.
Platform: AR-15
Caliber: 5.56 NATO
Compliance: Standard
Barrel Length: 16.0
Gas System Length: Mid-Length
Platform
AR-15
Caliber
5.56 NATO
Compliance
Standard
Barrel Length
16.0
Gas System Length
Mid-Length
$1,400$1,400
In Stock$1,400$1,400
In Stock
Sig Sauer
Sig Sauer MCX Spear LT Semi-Auto 16" 5.56 30rd Rifle, Black - RMCX-556N-16B-LT-B
Platform: AR-15
Caliber: 5.56 NATO
Compliance: Standard
Barrel Length: 16.0
Gas System Length: Mid-Length
Platform
AR-15
Caliber
5.56 NATO
Compliance
Standard
Barrel Length
16.0
Gas System Length
Mid-Length
$2,600$2,600
In Stock$2,600$2,600
In Stock
Sig Sauer
Sig Sauer MCX-SPEAR LT RMCX-556N-16B-LT-B Rifle 5.56 NATO 16" 30rd Semi-Auto Folding/Telescoping Stock, Ambi Controls.
Platform: AR-15
Caliber: 5.56 NATO
Barrel Length: 16.0
Gas System Length: Mid-Length
Platform
AR-15
Caliber
5.56 NATO
Barrel Length
16.0
Gas System Length
Mid-Length
$2,600$2,600
In Stock$2,600$2,600
In Stock
Sig Sauer
SIG SAUER MCX 5.56 NATO 16in 30rd IR Cerakote FDE Semi-Auto Rifle (RMCX-556N-16B-IR)
Platform: AR-15
Caliber: 5.56 NATO
Compliance: Standard
Barrel Length: 16.0
Gas System Length: Mid-Length
Platform
AR-15
Caliber
5.56 NATO
Compliance
Standard
Barrel Length
16.0
Gas System Length
Mid-Length
$2,600$2,600
In Stock$2,600$2,600
In Stock
Sig Sauer
Sig Sauer MPX K, Semi-Automatic Pistol, M-LOK, 4.5" Barrel, SIG Folding Brace, Timney Trigger - PMPX4B935
Platform: AR-9
Caliber: 9mm
Compliance: Standard
Barrel Length: 4.5
Gas System Length: Pistol
Platform
AR-9
Caliber
9mm
Compliance
Standard
Barrel Length
4.5
Gas System Length
Pistol
$2,200$2,200
In Stock$2,200$2,200
In Stock
Sig Sauer
SIG SAUER MCX-SPEAR LT IR 300 AAC Blackout 9in 30rd FDE Semi-Auto Pistol (PMCX-300B-9B-IR)
Platform: AR-15
Caliber: 300 Blackout
Compliance: Standard
Barrel Length: 9.0
Gas System Length: Pistol
Platform
AR-15
Caliber
300 Blackout
Compliance
Standard
Barrel Length
9.0
Gas System Length
Pistol
$2,500$2,500
In Stock$2,500$2,500
In Stock
Sig Sauer
Sig Sauer PMCX5BTAPNB MCX Rattler Pistol 5.5 30rd NB
Platform: AR-15
Caliber: 300 Blackout
Compliance: Standard
Barrel Length: 5.5
Gas System Length: Pistol
Platform
AR-15
Caliber
300 Blackout
Compliance
Standard
Barrel Length
5.5
Gas System Length
Pistol
$2,500$2,500
In Stock$2,500$2,500
In Stock
Sig Sauer
SIG SAUER MCX Rattler 5.56 NATO 5.5in 30rd No Brace Black Semi-Auto Pistol (PMCX-5B-TAP-NB)
Platform: AR-15
Caliber: 5.56 NATO
Compliance: Standard
Barrel Length: 5.5
Gas System Length: Pistol
Platform
AR-15
Caliber
5.56 NATO
Compliance
Standard
Barrel Length
5.5
Gas System Length
Pistol
$1,845$1,845
In Stock$1,845$1,845
In Stock
Sig Sauer
Sig Sauer RM400SDI16BR5FX M400 SDI 556 Black Tele
Platform: AR-15
Caliber: 5.56 NATO
Compliance: Standard
Barrel Length: 16.0
Gas System Length: Mid-Length
Platform
AR-15
Caliber
5.56 NATO
Compliance
Standard
Barrel Length
16.0
Gas System Length
Mid-Length
$1,750$1,750
In Stock$1,750$1,750
In Stock
Sig Sauer
SIG SAUER M400 SDI X-Series 5.56mm NATO 16in 30rd Flat Dark Earth Semi-Auto Rifle (RM400-SDI-16B-FDE)
Platform: AR-15
Caliber: 5.56 NATO
Compliance: Standard
Barrel Length: 16.0
Gas System Length: Mid-Length
Platform
AR-15
Caliber
5.56 NATO
Compliance
Standard
Barrel Length
16.0
Gas System Length
Mid-Length
$1,600$1,600
In Stock$1,600$1,600
In Stock
Sig Sauer
SIG SAUER M400-SDI X 5.56 NATO 11.5in 30rd Semi-Auto Pistol (PM400-SDI-11B-BLK)
Platform: AR-15
Caliber: 5.56 NATO
Compliance: Standard
Barrel Length: 11.5
Gas System Length: Carbine
Platform
AR-15
Caliber
5.56 NATO
Compliance
Standard
Barrel Length
11.5
Gas System Length
Carbine
$1,500$1,500
In Stock$1,500$1,500
In Stock
Sig Sauer
Sig Sauer PMPX3BCHNB MPX 3.5 Copperhead 20rd NB
Platform: AR-9
Caliber: 9mm
Compliance: Standard
Barrel Length: 3.5
Gas System Length: Pistol
Platform
AR-9
Caliber
9mm
Compliance
Standard
Barrel Length
3.5
Gas System Length
Pistol
$1,353$1,353
In Stock$1,353$1,353
In StockSig Sauer
Sig Sauer RM400SDI16BP M400 X-Series 16" 30+1, Black, Magpul SL-K Stock, OEM Polymer Grip, Flat Match Trigger
Platform: AR-15
Caliber: 5.56 NATO
Barrel Length: 16.0
Gas System Length: Mid-Length
Platform
AR-15
Caliber
5.56 NATO
Barrel Length
16.0
Gas System Length
Mid-Length
In Stock
$1,500$1,500
$1,500$1,500
Sig Sauer
SIG SAUER 516 G3 5.56mm NATO 16in 30rd Semi-Auto Rifle (R516G3-556N-16B)
Platform: AR-15
Caliber: 5.56 NATO
Compliance: Standard
Barrel Length: 16.0
Gas System Length: Mid-Length
Platform
AR-15
Caliber
5.56 NATO
Compliance
Standard
Barrel Length
16.0
Gas System Length
Mid-Length
In Stock
$2,000$2,000
$2,000$2,000
Sig Sauer
Sig Sauer MCX Spear 5.56 NATO AR-15 Pistol 11.5" 30rd, Coyote - PMCX-556N-11B-IR
Platform: AR-15
Caliber: 5.56 NATO
Compliance: Standard
Barrel Length: 11.5
Gas System Length: Carbine
Platform
AR-15
Caliber
5.56 NATO
Compliance
Standard
Barrel Length
11.5
Gas System Length
Carbine
In Stock
$2,500$2,500
$2,500$2,500
Sig Sauer
SIG SAUER M400 TREAD V2 5.56MM 16" V2 BLACK RIFLE
Platform: AR-15
Caliber: 5.56 NATO
Compliance: Standard
Barrel Length: 16.0
Gas System Length: Mid-Length
Platform
AR-15
Caliber
5.56 NATO
Compliance
Standard
Barrel Length
16.0
Gas System Length
Mid-Length
In Stock
$878$878
$878$878
Sig Sauer
Sig Sauer M400 Rose RM400-16B-ROSE-R5X2-10 Rifle, 5.56 NATO, 16" Barrel, 10+1, Semi-Auto, Romeo5 GenII, Rose Gold Controls.
Platform: AR-15
Caliber: 5.56 NATO
Compliance: Standard
Barrel Length: 16.0
Gas System Length: Mid-Length
Platform
AR-15
Caliber
5.56 NATO
Compliance
Standard
Barrel Length
16.0
Gas System Length
Mid-Length
In Stock
$1,400$1,400
$1,400$1,400
Sig Sauer
Sig Sauer MCX Spear LT Semi-Auto 16" 5.56 30rd Rifle, Black - RMCX-556N-16B-LT-B
Platform: AR-15
Caliber: 5.56 NATO
Compliance: Standard
Barrel Length: 16.0
Gas System Length: Mid-Length
Platform
AR-15
Caliber
5.56 NATO
Compliance
Standard
Barrel Length
16.0
Gas System Length
Mid-Length
In Stock
$2,600$2,600
$2,600$2,600
Sig Sauer
Sig Sauer MCX-SPEAR LT RMCX-556N-16B-LT-B Rifle 5.56 NATO 16" 30rd Semi-Auto Folding/Telescoping Stock, Ambi Controls.
Platform: AR-15
Caliber: 5.56 NATO
Barrel Length: 16.0
Gas System Length: Mid-Length
Platform
AR-15
Caliber
5.56 NATO
Barrel Length
16.0
Gas System Length
Mid-Length
In Stock
$2,600$2,600
$2,600$2,600
Sig Sauer
SIG SAUER MCX 5.56 NATO 16in 30rd IR Cerakote FDE Semi-Auto Rifle (RMCX-556N-16B-IR)
Platform: AR-15
Caliber: 5.56 NATO
Compliance: Standard
Barrel Length: 16.0
Gas System Length: Mid-Length
Platform
AR-15
Caliber
5.56 NATO
Compliance
Standard
Barrel Length
16.0
Gas System Length
Mid-Length
In Stock
$2,600$2,600
$2,600$2,600
Sig Sauer
Sig Sauer MPX K, Semi-Automatic Pistol, M-LOK, 4.5" Barrel, SIG Folding Brace, Timney Trigger - PMPX4B935
Platform: AR-9
Caliber: 9mm
Compliance: Standard
Barrel Length: 4.5
Gas System Length: Pistol
Platform
AR-9
Caliber
9mm
Compliance
Standard
Barrel Length
4.5
Gas System Length
Pistol
In Stock
$2,200$2,200
$2,200$2,200
Sig Sauer
SIG SAUER MCX-SPEAR LT IR 300 AAC Blackout 9in 30rd FDE Semi-Auto Pistol (PMCX-300B-9B-IR)
Platform: AR-15
Caliber: 300 Blackout
Compliance: Standard
Barrel Length: 9.0
Gas System Length: Pistol
Platform
AR-15
Caliber
300 Blackout
Compliance
Standard
Barrel Length
9.0
Gas System Length
Pistol
In Stock
$2,500$2,500
$2,500$2,500
Sig Sauer
Sig Sauer PMCX5BTAPNB MCX Rattler Pistol 5.5 30rd NB
Platform: AR-15
Caliber: 300 Blackout
Compliance: Standard
Barrel Length: 5.5
Gas System Length: Pistol
Platform
AR-15
Caliber
300 Blackout
Compliance
Standard
Barrel Length
5.5
Gas System Length
Pistol
In Stock
$2,500$2,500
$2,500$2,500
Sig Sauer
SIG SAUER MCX Rattler 5.56 NATO 5.5in 30rd No Brace Black Semi-Auto Pistol (PMCX-5B-TAP-NB)
Platform: AR-15
Caliber: 5.56 NATO
Compliance: Standard
Barrel Length: 5.5
Gas System Length: Pistol
Platform
AR-15
Caliber
5.56 NATO
Compliance
Standard
Barrel Length
5.5
Gas System Length
Pistol
In Stock
$1,845$1,845
$1,845$1,845
Sig Sauer
Sig Sauer RM400SDI16BR5FX M400 SDI 556 Black Tele
Platform: AR-15
Caliber: 5.56 NATO
Compliance: Standard
Barrel Length: 16.0
Gas System Length: Mid-Length
Platform
AR-15
Caliber
5.56 NATO
Compliance
Standard
Barrel Length
16.0
Gas System Length
Mid-Length
In Stock
$1,750$1,750
$1,750$1,750
Sig Sauer
SIG SAUER M400 SDI X-Series 5.56mm NATO 16in 30rd Flat Dark Earth Semi-Auto Rifle (RM400-SDI-16B-FDE)
Platform: AR-15
Caliber: 5.56 NATO
Compliance: Standard
Barrel Length: 16.0
Gas System Length: Mid-Length
Platform
AR-15
Caliber
5.56 NATO
Compliance
Standard
Barrel Length
16.0
Gas System Length
Mid-Length
In Stock
$1,600$1,600
$1,600$1,600
Sig Sauer
SIG SAUER M400-SDI X 5.56 NATO 11.5in 30rd Semi-Auto Pistol (PM400-SDI-11B-BLK)
Platform: AR-15
Caliber: 5.56 NATO
Compliance: Standard
Barrel Length: 11.5
Gas System Length: Carbine
Platform
AR-15
Caliber
5.56 NATO
Compliance
Standard
Barrel Length
11.5
Gas System Length
Carbine
In Stock
$1,500$1,500
$1,500$1,500
Sig Sauer
Sig Sauer PMPX3BCHNB MPX 3.5 Copperhead 20rd NB
Platform: AR-9
Caliber: 9mm
Compliance: Standard
Barrel Length: 3.5
Gas System Length: Pistol
Platform
AR-9
Caliber
9mm
Compliance
Standard
Barrel Length
3.5
Gas System Length
Pistol
In Stock
$1,353$1,353
$1,353$1,353
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