Loading...

Sig Sauer Upper Receivers

Shop now for in stock Sig Sauer Pistols and Rifles. We carry a great variety of Sig's offerings, including the P365, P320 Flux, MPX , MCX Spear, Sig M400 Tread and classics like the Sig P226, Sig P220 & more!

Sig Sauer is a top tier manufacturer of military grade firearms and accessories. From their legendary P226 to the P320, nothing beats the quality and workmanship of a Sig.

For more information about all things Sig, check out the Sig Sauer official website.

Can't find what you're looking for? Log in to be notified when matching products become available.

P365 XMacro X-Change, Fits Sig P365, 3.1" Barrel with Integrated Compensator, X-Ray Night Sights, Optic Ready, 17 Rounds, 2 Magazines 8901443

Out of stock

$552.00

Sig P365 XMacro X-Change, Fits Sig P365, 3.1" Barrel with Integrated Compensator, X-Ray Night Sights, Optic Ready, 17 Rounds, 2 Magazines 8901443

MCX-Rattler LT, Complete Upper Receiver, 300 Blackout, 6.75" Threaded Barrel, 5/8X24 Thread Pitch, Fits AR-15 Lower Receivers, Anodized Finish, Black, Includes Charging Handle and Bolt Carrier Group, Clutch-Lok Tapered QD Flash Hider UAMCX-300B-6B-LT-BLK

Out of stock

$1,799.99

Sig MCX-Rattler LT, Complete Upper Receiver, 300 Blackout, 6.75" Threaded Barrel, 5/8X24 Thread Pitch, Fits AR-15 Lower Receivers, Anodized Finish, Black, Includes Charging Handle and Bolt Carrier Group, Clutch-Lok Tapered QD Flash Hider UAMCX-300B-6B-LT-BLK

MCX-Spear LT, Complete Upper Receiver, 300 Blackout, 9" Threaded Barrel, 5/8X24 Thread Pitch, Fits AR-15 Lower Receivers, Anodized Finish, Black, Includes Charging Handle and Bolt Carrier Group, 3-Prong/SIG Suppressor QD Muzzle Device UAMCX-300B-9B-LT-BL

Out of stock

$1,699.99

Sig MCX-Spear LT, Complete Upper Receiver, 300 Blackout, 9" Threaded Barrel, 5/8X24 Thread Pitch, Fits AR-15 Lower Receivers, Anodized Finish, Black, Includes Charging Handle and Bolt Carrier Group, 3-Prong/SIG Suppressor QD Muzzle Device UAMCX-300B-9B-LT-BL

MCX-Spear LT, Complete Upper Receiver, 300 Blackout, 9" Threaded Barrel, 5/8X24 Thread Pitch, Fits AR-15 Lower Receivers, Anodized Finish, Flat Dark Earth, Includes Charging Handle and Bolt Carrier Group, 3-Prong/SIG Suppressor QD Muzzle Device UAMCX-300

Out of stock

$1,699.99

Sig MCX-Spear LT, Complete Upper Receiver, 300 Blackout, 9" Threaded Barrel, 5/8X24 Thread Pitch, Fits AR-15 Lower Receivers, Anodized Finish, Flat Dark Earth, Includes Charging Handle and Bolt Carrier Group, 3-Prong/SIG Suppressor QD Muzzle Device UAMCX-300

MCX-Spear LT, Complete Upper Receiver, .223 Remington/5.56 NATO, 11.5" Threaded Barrel, 1/2X28 Thread Pitch, Fits AR-15 Lower Receivers, Anodized Finish, Black, Includes Charging Handle and Bolt Carrier Group, 3-Prong/SIG Suppressor QD Muzzle Device UAMC

Out of stock

$1,699.99

Sig MCX-Spear LT, Complete Upper Receiver, .223 Remington/5.56 NATO, 11.5" Threaded Barrel, 1/2X28 Thread Pitch, Fits AR-15 Lower Receivers, Anodized Finish, Black, Includes Charging Handle and Bolt Carrier Group, 3-Prong/SIG Suppressor QD Muzzle Device UAMC

Caliber X-Change Kit, 9MM, 4.6" Threaded Barrel, Black, 17Rd, 320 Carry Tacops, CALX-320CA-9-TACOPS-TB

Out of stock

$570.00

Sig Caliber X-Change Kit, 9MM, 4.6" Threaded Barrel, Black, 17Rd, 320 Carry Tacops, CALX-320CA-9-TACOPS-TB

Out of stock

$558.00

Sig 300 Blackout, 16", Black, Caliber X-Change Kit, Sig MCX SGCALX-MCX-16B-300-TAP

Caliber Exchange Kit, Upper, 300 Blackout, 6.75", Black, Tapered Lug, Fits Sig MCX CALX-MCX-6B-300-TAP

Out of stock

$546.00

Sig Caliber Exchange Kit, Upper, 300 Blackout, 6.75", Black, Tapered Lug, Fits Sig MCX CALX-MCX-6B-300-TAP

Caliber Exchange Kit, For Sig MPX, 9MM, 6.5" Barel. Black CALX-MPX-6B-9-G2

Out of stock

$495.00

Sig Caliber Exchange Kit, For Sig MPX, 9MM, 6.5" Barel. Black CALX-MPX-6B-9-G2

SIG MCX Rattler Upper, 300 Blackout, 5.5" Barrel, M-Lok Handguard, Black Finish UAMCX-5B-300-BLK-TAP

Out of stock

$1,640.00

SIG MCX Rattler Upper, 300 Blackout, 5.5" Barrel, M-Lok Handguard, Black Finish UAMCX-5B-300-BLK-TAP