Sig Sauer
About Sig Sauer
Sig Sauer is a world-class firearms and optics manufacturer headquartered in Newington, New Hampshire. Sig Sauer’s standing in the professional market was elevated significantly when the United States Army selected their P320-based platform as the M17 and M18 under the Modular Handgun System contract — one of the most consequential military sidearm contracts in a generation. Beyond that milestone, Sig Sauer serves law enforcement agencies and military units across the globe, and their commercial lineup of pistols, rifles, suppressors, and optics reflects the same engineering standards demanded by those professional customers.
Shop Sig Sauer at Arms East
Arms East is proud to carry Sig Sauer across their full product range. From the P365 series that redefined the concealed carry category to their ROMEO and SIERRA optics lines, Sig brings genuine innovation to every segment they enter. Browse our current Sig Sauer inventory below.
Sig Sauer — Handguns (212)
- AR Pistols Add to cart
SIG M400 SDI X 5.56 NATO 11.5″ – M-LOK MAGPUL BSL BRACE BLACK
$1,549.00Low Stock - AR Pistols Add to cart
Sig Sauer MCX Spear: the U.S. Army Next Generation Squad Weapon Program contender featuring fully ambidextrous controls, Chrome Lined DLC barrel, and 2-stage match trigger for superior accuracy.
$4,133.00Low Stock - AR Pistols Add to cart
Sig Sauer’s MPX Copperhead is an ultra-compact 9mm semi-auto pistol featuring a monolithic Elite Series Cerakote® upper, integrated flash hider, and patented Pivoting Contour Brace for rapid deployment. Built on a fully-closed rotating bolt with short-stroke gas piston technology, it cycles all 9mm ammunition weights and brands while remaining fully ambidextrous for any shooter.
$2,274.00Low Stock - Semi Auto Handguns Add to cart
P211-GTO EQUINOX 9MM COMP 4.4” BBL (2)21(1)23RD MAG BLACK
$2,699.99In Stock - Semi Auto Handguns Add to cart
P226 X-FIVE CLASSIC 9MM LUGER 5”BBL (3)10RD MAGS SAO SS
$2,381.00Low Stock - Semi Auto Handguns Add to cart
P322 ROSE 22LR 4”BBL (3)20RD MAGS W/ROMEO-RS BLACK/ROSE
$601.00In Stock - Semi Auto Handguns Add to cart
P365 9MM 3.7IN BLK X-RAY 3 MOD POLY GRIP (2)10RD OR COMP
$962.00In Stock - Semi Auto Handguns Add to cart
P365 FUSE 9MM 4.3”BBL (1)17RD(2)21RD W/ROMEO-X SIG LOC CMPCT
$1,149.99In Stock
Sig Sauer — Scopes, Sights & Optics (148)
Sig Sauer — Magazines (80)
Sig Sauer — Handgun Parts (71)
Sig Sauer 8900949 P320 Sig P320 9mm Luger PVD Black Stainless Steel Optic Ready Slide XRAY3 Suppressor Sights Compatible With ROMEO1 PRO ROMEO2
Sig SauerAdd to cartHandgun Barrels Add to cartSig Sauer 8900949 P320 Sig P320 9mm Luger PVD Black Stainless Steel Optic Ready Slide XRAY3 Suppressor Sights Compatible With ROMEO1 PRO ROMEO2
$409.00Low StockSig Sauer BBLMODC357 P320 357 Sig 3.90″ Black DLC Fits Sig P320 Compact/P320 Carry
Sig SauerAdd to cartHandgun Barrels Add to cartSig Sauer BBLMODC357 P320 357 Sig 3.90″ Black DLC Fits Sig P320 Compact/P320 Carry
$163.00Low Stock- Handgun Barrels Add to cart
Sig Sauer factory replacement barrel for P320/P250 Full-size in .357 Sig with Black Nitron finish and specialized heat-treatment for enhanced durability.
$163.00Low Stock - Handgun Barrels Add to cart
SIG SAUER P320/P250 Full-size replacement barrel in .40 AUTO with drop-in installation and caliber conversion flexibility to .357SIG. Nitron-finished steel construction delivers OEM precision and durability.
$163.00Low Stock - Handgun Barrels Add to cart
Sig Sauer BBLMODC9 barrel for P320 Compact in 9mm Luger features black nitride steel construction for enhanced durability. Drop-in replacement design makes installation straightforward on your P320 platform.
$163.00Low Stock - Handgun Barrels Add to cart
SIG SAUER P320 9mm threaded barrel with 4.3″ barrel and 1/2×28 thread pitch, engineered for XCompact and SubCompact models with factory heat treatment for durability. Includes thread protector cap for immediate suppressor or muzzle device compatibility.
$209.00Low Stock
Sig Sauer — Ammunition (41)
- Ammunition Add to cart
Sig Sauer Short Trigger Rest Kit delivers premium components engineered for the P226 and P227 with exacting manufacturing standards and superior build quality. Designed for durability and reliability, it provides consistent performance for years of dependable service.
$45.00Low Stock - Handgun Ammunition Add to cart
SIG FMJ 40 S&W delivers consistent, affordable performance with clean-burning propellants and durable copper-jacketed 180 grain bullets designed for reliable training and competition use.
$35.00In Stock
Sig Sauer — Rifles (27)
- AR Rifles Add to cart
Sig Sauer M400 ROSE delivers competition-proven performance in 5.56 NATO with ambidextrous controls and included ROMEO5 GENII red dot sight. Complete package includes adjustable Magpul SL stock, slim M-LOK handguard, and two 30-round magazines.
$1,448.00In Stock - AR Rifles Add to cart
Sig Sauer M400 X-Series delivers German-engineered precision in a modern 5.56 NATO platform with a Match Grade trigger for consistent performance. The free-floating M-LOK handguard and Magpul stock make this 16″ rifle highly versatile.
$1,549.00Low Stock SIG SAUER M400 FORGE 5.56 RIFLE 16.5″ BBL, BLACK, ROMEO MSR G2, TELESTOCK 1-30RD MAG
Sig SauerAdd to cartAR Rifles Add to cartSIG SAUER M400 FORGE 5.56 RIFLE 16.5″ BBL, BLACK, ROMEO MSR G2, TELESTOCK 1-30RD MAG
$1,032.00In StockSig Sauer M400 Forge FDE Rifle 5.56 NATO 30rd Magazine 16″ Barrel ROMEO-MSR GEN II Adjustable Stock M-LOK Handguard
Sig SauerAdd to cartAR Rifles Add to cartSig Sauer M400 Forge FDE Rifle 5.56 NATO 30rd Magazine 16″ Barrel ROMEO-MSR GEN II Adjustable Stock M-LOK Handguard
$1,137.00Low Stock
Sig Sauer — Gun Parts (22)
- Handgun Parts Add to cart
Sig Sauer FCU 320 Frame 9/40/357 with titanium construction and Gold Nitride finish serves as the core component for building custom P320 pistols across thousands of possible configurations. Engineered with a striker-fired design and skeletonized flat trigger, it delivers reliable performance for duty, competition, and concealed carry applications.
$349.99In Stock - Handgun Parts Add to cart
Sig Sauer P320 Compact barrel with Gold Titanium-Nitride finish delivers increased lubricity for smooth operation. Factory replacement engineered for P320 Compact and Carry models.
$209.00Low Stock
Sig Sauer — Scope Accessories & Scope Parts (8)
- Scope Rings Add to cart
Sig Sauer Electro-Optics SOA63001 Alpha 6 Scope Ring Set Black Stainless Steel 30mm Tube Low
$89.99Low Stock - Scope Rings Add to cart
Sig Sauer Buckmaster 1 Inch Aluminum Scope Ring Set features 6061-T6 aluminum construction with low 0.85-inch ring height, designed to mount securely to Picatinny rails while maintaining scope reticle level for consistent accuracy.
Original price was: $28.00.$26.00Current price is: $26.00. SALEIn Stock - Scope Rings Add to cart
Sig Sauer BUCKMASTERS hunting rings feature precision-machined aluminum alloy construction engineered to securely mount your riflescope while preventing damage during installation. Built for strength and reliability in the field.
Original price was: $30.00.$28.00Current price is: $28.00. SALEIn Stock Sig Sauer Electro-Optics Alpha 6 Extra High 34mm Scope Ring Black Stainless Steel Accessory
Sig SauerAdd to cartScope Rings Add to cartSig Sauer Electro-Optics SOA64004 Alpha 6 Scope Ring Set Black Stainless Steel 34mm Tube Extra High
$99.99In Stock- Scope Rings Add to cart
Sig Sauer Electro-Optics SOA65004 Alpha 6 Scope Ring Set Black Stainless Steel 35mm Tube High
$99.99Low Stock - Scope Rings Add to cart
Sig Sauer Electro-Optics SOA64003 Alpha 6 Scope Ring Set Black Stainless Steel 34mm Tube High
$99.99Low Stock
Sig Sauer — AR Upper Parts (7)
- AR Handguards Add to cart
Sig Sauer M400 Tread 13″ handguard with M-LOK slots and lightening cuts for reduced weight on your platform rifle. Direct factory replacement with simple two-screw installation.
$136.00Low Stock - AR Handguards Add to cart
Sig Sauer Tread 15 Inch M-LOK free float handguard with lightening cuts for reduced weight and improved handling. Purpose-engineered for Sig Tread rifle series with two-screw installation.
Original price was: $136.00.$128.00Current price is: $128.00. SALEIn Stock
Sig Sauer — Shotgun Parts (6)
- Other Shotgun Accessories & Parts Add to cart
GRIP MODULE P320-X SERIES FS W/MANUAL SAFETY 9/40/357 BLACK
$82.00Low Stock
Sig Sauer — Holsters & Gun Leather (5)
Sig Sauer — Rifle Parts (5)
Sig Sauer — Class 3 Firearms, NFA & Destructive Devices (4)
View all Sig Sauer Class 3 Firearms, NFA & Destructive Devices (4)