Home > Rifle Parts > AR15 > AR15 Upper Parts
Choose a sub category:
Gas system Muzzle Devices Rails/Handguard
AR15 Laser Engraved Ejection Port Cover Upper Receiver

AR15 Upper Parts

R&B Arms offers a variety of AR15 Upper Parts to help complete your rifle build or upgrade your existing rifles.
Sort By:
Page of 1
AR-15 Gas Tube Roll pin AR-15 Gas Tube Roll pin
Our Price: $0.15
3-Slot Rail (MLok) Attachment 3-Slot Rail (MLok) Attachment
Our Price: $10.99
5-Slot Rail (MLok) Attachment 5-Slot Rail (MLok) Attachment
Our Price: $12.99
AR15 Standard Barrel Nut AR15 Standard Barrel Nut
Our Price: $14.99
7-Slot Rail (MLok) Attachment 7-Slot Rail (MLok) Attachment
Our Price: $14.99
AR-15 Carbine Length Gas Tube AR-15 Carbine Length Gas Tube (Black Nitride)
Our Price: $14.99
AR-15 Pistol length gas tube AR-15 Pistol length gas tube
Our Price: $14.99
AR15 Ejection Port Door AR15 Ejection Port Door Kit -Beskar Empire
Our Price: $16.00
AR15 Ejection Port Door AR15 Ejection Port Door Kit -Mud Horn
Our Price: $16.00
AR-15 Midlength Gas Tube (Black Nitrite) AR-15 Midlength Gas Tube (Black Nitrite)
Our Price: $16.99
AR-15 Rifle Length Gas Tube AR-15 Rifle Length Gas Tube
Our Price: $16.99
AR-15 low Profile Gas block 625 AR-15 low Profile Gas block .625
Our Price: $17.00
AR-15 low Profile Gas block 750 AR-15 low Profile Gas block .750
Our Price: $17.00
MAGPUL M-LOK MOE MVG ODG MAGPUL M-LOK MOE MVG ODG
Our Price: $21.81
AR-15 Upper Receiver Assembly Kit AR-15 Upper Receiver Assembly Kit
Our Price: $42.79
AR-15 Skeletonized Steel Low Profile Gas Block AR-15 Skeletonized Steel Low Profile Gas Block .750
Our Price: $49.00
Troy 2" gas block Troy 2" gas block
Our Price: $58.99
GunTec Mod Lite 7 7″ Mod Lite Skeletonized Series M-LOK Free Floating Handguard With Monolithic Top Rail (Anodized Black)
List Price: $99.95
Our Price: $70.00
Savings: $29.95
GunTec Mod Lite GunTec 10″ Mod Lite Skeletonized Series M-LOK Free Floating Handguard With Monolithic Top Rail
List Price: $129.95
Our Price: $78.00
Savings: $51.95
GunTec Mod Lite 12 GunTec 12″ Mod Lite Skeletonized Series M-LOK Free Floating Handguard With Monolithic Top Rail (Anodized Black)
List Price: $139.95
Our Price: $88.00
Savings: $51.95
GunTec AirLite 12 12″ Air Lite M-LOK Free Floating Handguard With Monolithic Top Rail (Anodized Black)
List Price: $129.95
Our Price: $93.18
Savings: $36.77
GunTec Mod Lite 15 15″ Mod Lite Skeletonized Series M-LOK Free Floating Handguard With Monolithic Top Rail (Anodized Black)
List Price: $149.95
Our Price: $98.00
Savings: $51.95
GunTec Mod Lite 9 9″ Mod Lite Skeletonized Series M-LOK Free Floating Handguard With Monolithic Top Rail (Flat Dark Earth)
List Price: $129.95
Our Price: $107.52
Savings: $22.43
AR-15 'Trump MAGA Series' Limited Edition 15in AR-15 'Trump MAGA Series' Limited Edition 15in
List Price: $200.00
Our Price: $185.99
Savings: $14.01
BCM® KMR ALPHA 15 BCM® KMR *ALPHA* 15 (KeyMod™ Free Float Handguard)
List Price: $210.00
Our Price: $199.95
Savings: $10.05