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Primary Weapons Systems Uppers, Compensators, UXR Magwells & Other PWS Gun Parts — 58 products / 67 models

Primary Weapons Systems develops premium gun parts and firearm accessories for competitive marksmen, military personnel, law enforcement, and tactical enthusiasts who demand nothing short of perfection. All PWS parts are crafted using state-of-the-art CNC machines or sourced from trusted manufacturers to ensure the highest quality gun parts possible. Our selection features Primary Weapons Systems UXR Magwells that utilize the Xchange system to assist with seamless caliber conversions while offering faster reloads and improved grip and control.image

Shop online at OpticsPlanet.com today for amazing deals on PWS enhanced buffer tubes, upper receivers, compensators & muzzle devices, and other top-tier gun parts for customizing your firearm. Browse our collection of How-to Guides to learn more about buying the best gun parts to upgrade your build. Stock up on Primary Weapons Systems gun parts and accessories today to save big and get Free Shipping on most orders over $49.

Popular Categories

Image of Gun Parts category Gun Parts
Image of Rifle Parts category Rifle Parts
Image of AR 15 Parts category AR 15 Parts
Image of AR15 Lower Parts category AR15 Lower Parts
Image of AR15 Upper Receivers category AR15 Upper Receivers
Image of AR15 Recoil Buffers category AR15 Recoil Buffers
Image of Muzzle Devices category Muzzle Devices
Image of Weapon Accessories category Weapon Accessories
Image of Flash Hiders category Flash Hiders
Image of AR15 Buffer Tubes category AR15 Buffer Tubes
Image of Muzzle Brakes & Compensators category Muzzle Brakes & Compensators
Image of AR15 Bolt Catches & Releases category AR15 Bolt Catches & Releases
Image of Firearms category Firearms
Image of Magazines category Magazines

58 Products in Primary Weapons Systems

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Image of Primary Weapons Systems EBT Mod 2 End Plate and Castle Nut Primary Weapons Systems EBT Mod 2 End Plate and Castle Nut (112) List: $49.95 (Save 24%) $37.99 Best Rated
Image of Primary Weapons Systems MK111 MOD2-M, .223 Wylde, 11.85 in Upper Receiver Primary Weapons Systems MK111 MOD2-M, .223 Wylde, 11.85 in Upper Receiver (5) List: $1,399.95 (Save $100.00) $1,299.95 Best Rated
Image of Primary Weapons Systems MK109 MOD 2-M, .300 AAC Blackout, 9.75 inch Upper Receiver Primary Weapons Systems MK109 MOD 2-M, .300 AAC Blackout, 9.75 inch Upper Receiver (1) List: $1,399.95 (Save $100.00) $1,299.95
Image of Primary Weapons Systems MK111 MOD1-M .223 Wylde, 11.85in bbl Upper Receiver Primary Weapons Systems MK111 MOD1-M .223 Wylde, 11.85in bbl Upper Receiver (4) List: $1,129.95 (Save $80.00) $1,049.95
Image of Primary Weapons Systems MK111 MOD 2-M 20.75in 7.62x39 Upper Receiver Primary Weapons Systems MK111 MOD 2-M 20.75in 7.62x39 Upper Receiver List: $1,399.95 (Save $100.00) $1,299.95
Image of Primary Weapons Systems MK114 MOD 2-M, .223 Wylde, 14.5in Upper Receiver 2 models Primary Weapons Systems MK114 MOD 2-M, .223 Wylde, 14.5in Upper Receiver (2) List: $1,399.95 (Save $100.00) $1,299.95
Image of Primary Weapons Systems MK116 MOD1-M 16 inch .223 Wylde Upper Receiver Primary Weapons Systems MK116 MOD1-M 16 inch .223 Wylde Upper Receiver (4) List: $1,129.95 (Save $80.00) $1,049.95
Image of Primary Weapons Systems MK111 MOD 1-M, 7.62x39mm, 11.85in Upper Receiver Primary Weapons Systems MK111 MOD 1-M, 7.62x39mm, 11.85in Upper Receiver List: $1,129.95 (Save $101.00) $1,028.95
Image of Primary Weapons Systems MK116 MOD 2-M, 7.62x39mm, 16.1in Upper Receiver Primary Weapons Systems MK116 MOD 2-M, 7.62x39mm, 16.1in Upper Receiver List: $1,399.95 (Save $126.00) $1,273.95
Image of Primary Weapons Systems MK114 MOD 1-M .223 Wylde, 14.5in bbl Upper Receiver Primary Weapons Systems MK114 MOD 1-M .223 Wylde, 14.5in bbl Upper Receiver (6) List: $1,129.95 (Save $80.00) $1,049.95 Best Rated
Image of Primary Weapons Systems PWS Enhanced Carbine Recoil Buffer MOD 2 2 models Primary Weapons Systems PWS Enhanced Carbine Recoil Buffer MOD 2 (14) As Low As (Save Up to 20%) $39.99 Best Rated
Image of Primary Weapons Systems PWS Enhanced Suppressor Weight Recoil Buffer MOD 2 Primary Weapons Systems PWS Enhanced Suppressor Weight Recoil Buffer MOD 2 (3) List: $119.95 (Save 25%) $89.95
Image of Primary Weapons Systems PWS Enhanced 308 Short Recoil Buffer MOD 2 Primary Weapons Systems PWS Enhanced 308 Short Recoil Buffer MOD 2 (1) List: $119.95 (Save 56%) $52.35 On Sale
Image of Primary Weapons Systems UXR 6.5Creedmoor/308Win AR-10 Magwell Assembly Primary Weapons Systems UXR 6.5Creedmoor/308Win AR-10 Magwell Assembly List: $129.95 (Save $11.96) $117.99
Image of Primary Weapons Systems PWS Enhanced Buffer Tube, Mil-Spec Gen 2 Ratchet Lock Endplate Primary Weapons Systems PWS Enhanced Buffer Tube, Mil-Spec Gen 2 Ratchet Lock Endplate (96) List: $109.95 (Save $10.00) $99.95 Best Rated
Image of Primary Weapons Systems MOD 2 FSC Series Flash Suppressing Compensator 3 models Primary Weapons Systems MOD 2 FSC Series Flash Suppressing Compensator (3) As Low As (Save Up to 19%) $80.49 Blazin' Deal
Image of Primary Weapons Systems BDE PUB XL Mount Primary Weapons Systems BDE PUB XL Mount List: $95.00 (Save $6.81) $88.19
Image of Primary Weapons Systems MK109 MOD1-M 9.75-inch Upper Receiver Primary Weapons Systems MK109 MOD1-M 9.75-inch Upper Receiver (1) List: $1,129.95 (Save $80.00) $1,049.95
Image of Primary Weapons Systems MK116 MOD 1-M 16.1in 7.62x39 Upper Receiver Primary Weapons Systems MK116 MOD 1-M 16.1in 7.62x39 Upper Receiver List: $1,129.95 (Save $80.00) $1,049.95
Image of Primary Weapons Systems Mod 2 Bolt Catch Primary Weapons Systems Mod 2 Bolt Catch List: $43.99 (Save $2.34) $41.65
Image of Primary Weapons Systems MK116 MOD 2-M, .223, 16in Upper Receiver Primary Weapons Systems MK116 MOD 2-M, .223, 16in Upper Receiver (5) List: $1,399.95 (Save $100.00) $1,299.95 Best Rated
Image of Primary Weapons Systems UXR 6.5 Creedmoor 18'' Barrel Conversion Kit Primary Weapons Systems UXR 6.5 Creedmoor 18'' Barrel Conversion Kit List: $629.99 (Save 21%) $499.95
Image of Primary Weapons Systems UXR .223 Wylde 14.50'' Barrel Conversion Kit Primary Weapons Systems UXR .223 Wylde 14.50'' Barrel Conversion Kit List: $629.99 (Save 21%) $499.95
Image of Primary Weapons Systems UXR .223 Wylde 16'' Barrel Conversion Kit Primary Weapons Systems UXR .223 Wylde 16'' Barrel Conversion Kit List: $629.99 (Save 21%) $499.95
Image of Primary Weapons Systems BDE PUB Mount Primary Weapons Systems BDE PUB Mount (2) List: $95.00 (Save 12%) $83.69
Image of Primary Weapons Systems FRC Compensator Flat 3 Port .223 Caliber Primary Weapons Systems FRC Compensator Flat 3 Port .223 Caliber (2) List: $97.69 (Save 13%) $84.95
Image of Primary Weapons Systems FRC Compensator Flat 2 Port .223 Caliber Primary Weapons Systems FRC Compensator Flat 2 Port .223 Caliber List: $99.95 (Save 15%) $84.95
Image of Primary Weapons Systems CQB Series Comp Muzzle Device 2 models Primary Weapons Systems CQB Series Comp Muzzle Device (8) List: $139.00 (Save Up to 10%) $125.95 Best Rated
Image of Primary Weapons Systems FRC Compensator Flat 2 Port .308 Caliber Primary Weapons Systems FRC Compensator Flat 2 Port .308 Caliber List: $99.95 (Save 15%) $84.95
Image of Primary Weapons Systems Enhanced Pistol Buffer Tube w/ Ratchet Lock Castle Nut Endplate Primary Weapons Systems Enhanced Pistol Buffer Tube w/ Ratchet Lock Castle Nut Endplate List: $109.95 (Save 12%) $96.79
Image of Primary Weapons Systems FRC Compensator 2 models Primary Weapons Systems FRC Compensator List: $99.00 (Save $9.05) $89.95
Image of Primary Weapons Systems FRC Compensator Flat 3 Port .308 Caliber Primary Weapons Systems FRC Compensator Flat 3 Port .308 Caliber (1) List: $93.99 (Save 10%) $84.95
Image of Primary Weapons Systems BDE PUB-A Mount Primary Weapons Systems BDE PUB-A Mount List: $95.00 (Save $7.51) $87.49
Image of Primary Weapons Systems HID Suppressor Mount Primary Weapons Systems HID Suppressor Mount List: $99.00 (Save $9.05) $89.95
Image of Primary Weapons Systems Piston, Fits 13.5x1LH, Anodized Finish, Black Primary Weapons Systems Piston, Fits 13.5x1LH, Anodized Finish, Black List: $79.00 (Save 11%) $69.95
Image of Primary Weapons Systems Precision Rifle Compensator Muzzle Device Primary Weapons Systems Precision Rifle Compensator Muzzle Device (2) List: $99.00 (Save 14%) $84.96
Image of Primary Weapons Systems J-Tac 47 Compensator Primary Weapons Systems J-Tac 47 Compensator (3) List: $57.95 (Save 14%) $49.95
Image of Primary Weapons Systems UXR 223Wylde/300Blackout AR-15 Magwell Assembly Primary Weapons Systems UXR 223Wylde/300Blackout AR-15 Magwell Assembly List: $129.95 (Save 12%) $113.99
Image of Primary Weapons Systems Piston Primary Weapons Systems Piston List: $79.00 (Save 11%) $69.95
Image of Primary Weapons Systems .578x28 Piston Primary Weapons Systems .578x28 Piston List: $79.00 (Save 11%) $69.95
Image of Primary Weapons Systems UXR MagWell Assembly 3 models Primary Weapons Systems UXR MagWell Assembly As Low As (Save Up to 14%) $129.95
Image of Primary Weapons Systems Mount 2 models Primary Weapons Systems Mount List: $79.00 (Save 11%) $69.95
Image of Primary Weapons Systems UXR .300 Blackout 10.50'' Barrel Conversion Kit Primary Weapons Systems UXR .300 Blackout 10.50'' Barrel Conversion Kit List: $629.99 (Save 21%) $499.95
Image of Primary Weapons Systems UXR 8.6 Blackout 10.50'' Barrel Conversion Kit Primary Weapons Systems UXR 8.6 Blackout 10.50'' Barrel Conversion Kit List: $629.99 (Save 21%) $499.95
Image of PWS FRC-T-2P-1/2X28 FRC COMP TAP 2PORT 223 1/2-28 PWS FRC-T-2P-1/2X28 FRC COMP TAP 2PORT 223 1/2-28 $89.95
Image of Primary Weapons Systems UXR 7.62x39mm 16'' Barrel Conversion Kit Primary Weapons Systems UXR 7.62x39mm 16'' Barrel Conversion Kit List: $629.99 (Save 21%) $499.95
Image of Primary Weapons Systems UXR 7.62x39mm 14.50'' Barrel Conversion Kit Primary Weapons Systems UXR 7.62x39mm 14.50'' Barrel Conversion Kit List: $629.99 (Save 21%) $499.95
Image of Primary Weapons Systems UXR 308 Winchester 14.50'' Barrel Conversion Kit Primary Weapons Systems UXR 308 Winchester 14.50'' Barrel Conversion Kit List: $629.99 (Save 21%) $499.95
Image of Primary Weapons Systems UXR .300 Blackout 14.50'' Barrel Conversion Kit Primary Weapons Systems UXR .300 Blackout 14.50'' Barrel Conversion Kit List: $649.99 (Save 23%) $499.95
Image of Primary Weapons Systems UXR 8.6 Blackout 14.50'' Barrel Conversion Kit Primary Weapons Systems UXR 8.6 Blackout 14.50'' Barrel Conversion Kit List: $629.99 (Save 21%) $499.95
Image of Primary Weapons Systems UXR 308 Winchester 16'' Barrel Conversion Kit Primary Weapons Systems UXR 308 Winchester 16'' Barrel Conversion Kit List: $629.99 (Save 21%) $499.95
Image of Primary Weapons Systems MK107 MOD 2-M 7.62x39 7.75in Upper Receiver Primary Weapons Systems MK107 MOD 2-M 7.62x39 7.75in Upper Receiver List: $1,349.95 (Save $50.00) $1,299.95
Image of Primary Weapons Systems UXR 7.62x39mm Magwell Assembly Primary Weapons Systems UXR 7.62x39mm Magwell Assembly List: $229.99 (Save 22%) $179.99
Image of Primary Weapons Systems MK1 MOD 2 Upper Receiver Primary Weapons Systems MK1 MOD 2 Upper Receiver (2) List: $1,349.95 (Save $50.00) $1,299.95
Image of Primary Weapons Systems MK218 Semi-Auto Rifle, .308 Winchester, 18 in barrel Primary Weapons Systems MK218 Semi-Auto Rifle, .308 Winchester, 18 in barrel Info Buy Accessories
Image of Primary Weapons Systems MK114 Semi-Auto Rifle, .223 Wylde, 14.50 in barrel Primary Weapons Systems MK114 Semi-Auto Rifle, .223 Wylde, 14.50 in barrel Info Buy Accessories
Image of Primary Weapons Systems MK116 Semi-Auto Rifle, .223 Wylde, 16 in barrel Primary Weapons Systems MK116 Semi-Auto Rifle, .223 Wylde, 16 in barrel Info Buy Accessories
Image of Primary Weapons Systems MK116 Semi-Auto Rifle, .223 Wylde, 16.10 in barrel Primary Weapons Systems MK116 Semi-Auto Rifle, .223 Wylde, 16.10 in barrel Info Buy Accessories
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Featured: AR15 Upper Receivers

Primary Weapons Systems How To Guides View All

4 Most Common AR15 Issues & How to Fix Them by Corey F.
The Importance of MLOK & Picatinny Rail Covers by Brett R.
Why You Should Upgrade Your Lever-Action Rifle by Ethan L
What Is a Lever Action Rifle? by Ethan L

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