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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.
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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
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 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 Midlength Gas Tube (Black Nitrite) AR-15 Midlength Gas Tube (Black Nitrite)
Our Price: $22.50
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
BCM GUNFTR CHARG HNDL 556 MOD3B L BCM GUNFTR CHARG HNDL 556 MOD3B L
List Price: $53.95
Our Price: $49.95
Savings: $4.00
BCM GUNFTR CHARG HNDL 556 MOD4B M BCM GUNFTR CHARG HNDL 556 MOD4B M
List Price: $53.95
Our Price: $49.95
Savings: $4.00
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
RADIAN RAPTOR-SL CHRGNG HNDL 556 BLK RADIAN RAPTOR-SL CHRGNG HNDL 556 BLK
List Price: $79.95
Our Price: $75.95
Savings: $4.00
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
BCM GUNFTR CHARG HNDL 556 MOD3X3 AMB BCM GUNFTR CHARG HNDL 556 MOD3X3 AMB
Our Price: $79.95
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
AR-15 Stripped Billet Upper Receiver AR-15 Stripped Billet Upper Receiver
Our Price: $97.50
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