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.308 Complete Upper Receivers & Assemblies from Top Brands like Aero Precision, CMMG & Guntec USA — 77 products / 360 models

Unlock precision and power for your AR platform with our selection of high-quality 308 uppers from best-rated brands. These .308 upper receivers, including both standard 308 uppers and LR 308 uppers, offer enhanced accuracy, reliability, and versatility to elevate your rifle's capability. Each AR upper is crafted to ensure seamless compatibility with a wide range of AR-10 and DPMS-pattern lowers, making installation straightforward and customization effortless.image

Choose from various barrel lengths, including 16in, 18in, and 20in, to match your preferred shooting scenario, from maneuverability in the field to precision at extended distances. Features such as robust forged or billet aluminum receivers, precision-machined barrels, and free-floating M-LOK and Picatinny handguards deliver consistent accuracy and lasting durability.

Shop online at OpticsPlanet.com for amazing deals on 308 uppers from trusted brands like Aero Precision and CMMG. Whether you're building a custom AR-10 or upgrading for distance, our complete upper receivers, equipped with bolt carrier groups and charging handles, help you achieve next-level shooting experience. Gear up today to get Free Shipping on most orders over $49.

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Image of LaRue Tactical Complete Match Grade 18in .308 Upper Receiver LaRue Tactical Complete Match Grade 18in .308 Upper Receiver (2) $1,999.99
Image of Aero Precision M5E1 20in .308 Barrel Complete Upper Receiver with Flash Hider made-in-usa-flag 6 models Aero Precision M5E1 20in .308 Barrel Complete Upper Receiver with Flash Hider (25) As Low As (Save Up to 34%) $458.99 Blazin' Deal
Image of Aero Precision M5 18in .308 SS Complete Upper Receiver with Flash Hider w/ ATLAS R-ONE Handguard made-in-usa-flag 2 models Aero Precision M5 18in .308 SS Complete Upper Receiver with Flash Hider w/ ATLAS R-ONE Handguard As Low As (Save Up to 28%) $619.99 Blazin' Deal
Image of Aero Precision M5 20in .308 CMV Complete Upper Receiver w/ Flash Hider & ATLAS S-ONE Handguard made-in-usa-flag 2 models Aero Precision M5 20in .308 CMV Complete Upper Receiver w/ Flash Hider & ATLAS S-ONE Handguard (10) As Low As (Save Up to 26%) $619.99 Blazin' Deal
Image of Aero Precision M5 16in .308 Winchester RM15 Complete Upper Receiver made-in-usa-flag 6 models Aero Precision M5 16in .308 Winchester RM15 Complete Upper Receiver (1) As Low As (Save Up to 28%) $593.99 Blazin' Deal
Image of Daniel Defense DD5 V3 URG 16 inch .308 Winchester Upper Receiver with Flash Hider Assembly Daniel Defense DD5 V3 URG 16 inch .308 Winchester Upper Receiver with Flash Hider Assembly List: $1,970.80 (Save $39.80) $1,931.00
Image of Aero Precision M5 18in .308 SS Complete Upper Receiver with Flash Hider w/ ATLAS S-ONE Handguard made-in-usa-flag 2 models Aero Precision M5 18in .308 SS Complete Upper Receiver with Flash Hider w/ ATLAS S-ONE Handguard As Low As (Save 19%) $665.99 Blazin' Deal
Image of POF USA Revolution PD Complete Upper 8 of 12 models POF USA Revolution PD Complete Upper (1) As Low As (Save Up to 16%) $1,599.00 Final Sale
Image of Aero Precision M5 20in .308 Winchester RM15 Complete Upper Receiver made-in-usa-flag 4 models Aero Precision M5 20in .308 Winchester RM15 Complete Upper Receiver (11) As Low As (Save Up to 36%) $512.99 Blazin' Deal
Image of CMMG Dissent, Mk3, .308 Winchester, 20 inch Upper Receiver 8 models CMMG Dissent, Mk3, .308 Winchester, 20 inch Upper Receiver As Low As (Save Up to 17%) $1,119.00
Image of Aero Precision M5 16in .308 SS Complete Upper Receiver with Flash Hider w/ ATLAS R-ONE Handguard made-in-usa-flag 4 models Aero Precision M5 16in .308 SS Complete Upper Receiver with Flash Hider w/ ATLAS R-ONE Handguard (1) As Low As (Save Up to 30%) $476.99 Blazin' Deal
Image of Aero Precision M5 20in .308 SS Complete Upper Receiver with Flash Hider w/ ATLAS R-ONE Handguard made-in-usa-flag 2 models Aero Precision M5 20in .308 SS Complete Upper Receiver with Flash Hider w/ ATLAS R-ONE Handguard (2) As Low As (Save Up to 26%) $639.99 Blazin' Deal
Image of Stag Arms 10 Marksman Right Hand 18in .308 Caliber Upper Receiver made-in-usa-flag 2 models Stag Arms 10 Marksman Right Hand 18in .308 Caliber Upper Receiver As Low As (Save 21%) $629.99 Blazin' Deal
Image of CMMG Dissent, Mk3, .308 Winchester, 16.1 inch Upper Receiver 8 models CMMG Dissent, Mk3, .308 Winchester, 16.1 inch Upper Receiver (1) As Low As (Save Up to 13%) $1,179.00
Image of Aero Precision M5E1 18in .308 Win/7.62x51mm NATO 4150 Chrome Moly V Complete Upper Receiver made-in-usa-flag Aero Precision M5E1 18in .308 Win/7.62x51mm NATO 4150 Chrome Moly V Complete Upper Receiver (6) List: $690.00 (Save 30%) $485.99 Blazin' Deal
Image of Aero Precision M5E1 .308 Enhanced Upper Receiver made-in-usa-flag 4 models Aero Precision M5E1 .308 Enhanced Upper Receiver (37) As Low As (Save Up to 19%) $197.99 Blazin' Deal
Image of Rock River Arms X-1 .308/7.62X51mm Completed Upper 2 models Rock River Arms X-1 .308/7.62X51mm Completed Upper As Low As (Save Up to 11%) $834.49
Image of Aero Precision M5 .308 Assembled Upper Receiver made-in-usa-flag 6 models Aero Precision M5 .308 Assembled Upper Receiver (43) As Low As (Save Up to 20%) $175.49 Blazin' Deal
Image of Bear Creek Arsenal BC-10 .308 Winchester 22in Bolt Action Style Upper Receiver 2 models Bear Creek Arsenal BC-10 .308 Winchester 22in Bolt Action Style Upper Receiver As Low As (Save Up to 24%) $289.99
Image of Aero Precision M5 18in .308 CMV Complete Upper Receiver with Flash Hider w/ ATLAS R-ONE Handguard made-in-usa-flag 2 models Aero Precision M5 18in .308 CMV Complete Upper Receiver with Flash Hider w/ ATLAS R-ONE Handguard (10) As Low As (Save Up to 27%) $602.99 Blazin' Deal
Image of Aero Precision M5 16in .308 SS Complete Upper Receiver with Flash Hider w/ ATLAS S-ONE Handguard made-in-usa-flag 3 models Aero Precision M5 16in .308 SS Complete Upper Receiver with Flash Hider w/ ATLAS S-ONE Handguard As Low As (Save Up to 31%) $494.99 Blazin' Deal
Image of Aero Precision .308 UPPER STRP FDE made-in-usa-flag 2 models Aero Precision .308 UPPER STRP FDE (8) As Low As (Save 19%) $152.99 Blazin' Deal
Image of Aero Precision M5E1 18in .308 Winchester Complete Upper Receiver with Flash Hider made-in-usa-flag 7 models Aero Precision M5E1 18in .308 Winchester Complete Upper Receiver with Flash Hider (16) As Low As (Save Up to 32%) $499.99 Blazin' Deal
Image of Aero Precision M5 16in .308 CMV Complete Upper Receiver w/ATLAS R-ONE Handguard with Flash Hider made-in-usa-flag 4 models Aero Precision M5 16in .308 CMV Complete Upper Receiver w/ATLAS R-ONE Handguard with Flash Hider (1) As Low As (Save Up to 30%) $455.39 Blazin' Deal
Image of Aero Precision M5 20in .308 SS Complete Upper Receiver with Flash Hider w/ ATLAS S-ONE Handguard made-in-usa-flag 2 models Aero Precision M5 20in .308 SS Complete Upper Receiver with Flash Hider w/ ATLAS S-ONE Handguard (4) As Low As (Save Up to 28%) $629.99 Blazin' Deal
Image of Aero Precision M5 18in .308 CMV Complete Upper Receiver with Flash Hider w/ ATLAS S-ONE Handguard made-in-usa-flag 2 models Aero Precision M5 18in .308 CMV Complete Upper Receiver with Flash Hider w/ ATLAS S-ONE Handguard (6) As Low As (Save Up to 29%) $589.99 Blazin' Deal
Image of Stag Arms AR-10 Stag 10 Stripped Upper Receiver made-in-usa-flag 3 models Stag Arms AR-10 Stag 10 Stripped Upper Receiver As Low As (Save Up to 25%) $134.99 Blazin' Deal
Image of Aero Precision M5 16in .308 CMV Complete Upper Receiver with Flash Hider w/ ATLAS S-ONE Handguard made-in-usa-flag 4 models Aero Precision M5 16in .308 CMV Complete Upper Receiver with Flash Hider w/ ATLAS S-ONE Handguard (8) As Low As (Save Up to 30%) $455.39 Blazin' Deal
Image of Bear Creek Arsenal BC-10 .308 Winchester 20in Bolt Action Style Upper Receiver 4 models Bear Creek Arsenal BC-10 .308 Winchester 20in Bolt Action Style Upper Receiver As Low As (Save Up to 27%) $293.99
Image of V Seven AR-10 308 Harbinger Upper Receiver V Seven AR-10 308 Harbinger Upper Receiver (1) List: $405.00 (Save $12.15) $392.85
Image of TacFire DPMS .308 Winchester Complete Upper Assembly made-in-usa-flag 3 models TacFire DPMS .308 Winchester Complete Upper Assembly (9) As Low As (Save Up to 29%) $409.99
Image of Stag Arms 10 Tactical Left Hand 16in .308 Caliber Upper Receiver made-in-usa-flag 2 models Stag Arms 10 Tactical Left Hand 16in .308 Caliber Upper Receiver (1) As Low As (Save Up to 23%) $539.99 Blazin' Deal
Image of Luth-AR .308 A3 Upper Receiver Luth-AR .308 A3 Upper Receiver (2) List: $159.99 (Save $9.60) $150.39
Image of Stag Arms 10 Tactical Right Hand 16in .308 Caliber Upper Receiver made-in-usa-flag Stag Arms 10 Tactical Right Hand 16in .308 Caliber Upper Receiver List: $729.99 (Save 22%) $566.99 Blazin' Deal
Image of Rock River Arms Predator HP A4 .308/7.62X51mm NATO Completed Upper 2 models Rock River Arms Predator HP A4 .308/7.62X51mm NATO Completed Upper As Low As (Save Up to 15%) $859.99
Image of Stag Arms 10 Marksman Left Hand 18in .308 Caliber Upper Receiver made-in-usa-flag 2 models Stag Arms 10 Marksman Left Hand 18in .308 Caliber Upper Receiver As Low As (Save 21%) $629.99 Blazin' Deal
Image of Stag Arms AR-10 Stag 10 Upper Receiver made-in-usa-flag 4 models Stag Arms AR-10 Stag 10 Upper Receiver (3) As Low As (Save Up to 25%) $134.99 Blazin' Deal
Image of Guntec USA AR .308 Gen 2 Stripped Billet Upper Receiver 11 models Guntec USA AR .308 Gen 2 Stripped Billet Upper Receiver (1) As Low As (Save Up to 23%) $149.33
Image of SEEKINS 0011100121-F SP10M CMPLT UPPR 308 22 FDE SEEKINS 0011100121-F SP10M CMPLT UPPR 308 22 FDE $2,750.00
Image of V Seven Harbinger 308 Complete Upper 3 models V Seven Harbinger 308 Complete Upper (1) As Low As (Save Up to $75.24) $2,038.94
Image of Daniel Defense DD5 V4 URG 18 inch .308 Winchester Upper Receiver with Flash Hider Assembly Daniel Defense DD5 V4 URG 18 inch .308 Winchester Upper Receiver with Flash Hider Assembly List: $2,180.99 (Save 11%) $1,931.00
Image of POF USA Revolution Piston 308 WIN Upper Reciever POF USA Revolution Piston 308 WIN Upper Reciever List: $1,337.00 (Save $75.00) $1,262.00
Image of POF USA Rogue Upper Reciever Assembly 4 of 6 models POF USA Rogue Upper Reciever Assembly As Low As (Save Up to $86.00) $1,373.00
Image of CMMG Mk3 Banshee Upper Receiver Group CMMG Mk3 Banshee Upper Receiver Group List: $1,049.95 (Save $59.96) $989.99
Image of Rock River Arms Varmint A4 .308/7.62X51mm NATO Completed Upper Rock River Arms Varmint A4 .308/7.62X51mm NATO Completed Upper List: $775.00 (Save $63.80) $711.20
Image of CMMG Dissent, Mk3, .308 Winchester, 12.5 inch Upper Receiver 8 models CMMG Dissent, Mk3, .308 Winchester, 12.5 inch Upper Receiver As Low As (Save Up to 12%) $1,159.00
Image of CMMG Mk3 Resolute Upper Receiver Group CMMG Mk3 Resolute Upper Receiver Group List: $1,099.95 (Save $70.95) $1,029.00
Image of CMMG Mk3 .308WIN 24in Endeavor Upper Group Receiver 5 models CMMG Mk3 .308WIN 24in Endeavor Upper Group Receiver As Low As (Save Up to 10%) $1,079.00
Image of TacFire SS-RK308-LPK-18BN 308 RFL BUILD KIT SSRK308LPK18BN TacFire SS-RK308-LPK-18BN 308 RFL BUILD KIT SSRK308LPK18BN List: $705.99 (Save 21%) $558.49
Image of TacFire SS-RK308-LPK-20BN 308 RFL BUILD KIT SSRK308LPK20BN TacFire SS-RK308-LPK-20BN 308 RFL BUILD KIT SSRK308LPK20BN List: $689.99 (Save 19%) $558.49
Image of Rock River Arms Mid-Length A4 .308/7.62X51mm NATO Completed Upper Rock River Arms Mid-Length A4 .308/7.62X51mm NATO Completed Upper (1) List: $620.00 (Save $50.01) $569.99
Image of CMMG Mk3 .308WIN Banshee Upper Group Receiver 18 models CMMG Mk3 .308WIN Banshee Upper Group Receiver As Low As (Save Up to 10%) $949.99
Image of Optics Planet Exclusive Aero Precision M5E1 18in .308 SS Complete Upper Receiver made-in-usa-flag Optics Planet Exclusive Aero Precision M5E1 18in .308 SS Complete Upper Receiver List: $914.97 (Save 13%) $799.99 Blazin' Deal
Image of JL Billet .308 Billet Upper Reciever made-in-usa-flag JL Billet .308 Billet Upper Reciever (1) List: $249.95 (Save 10%) $224.96
Image of Aero Precision M5 18in .308 Winchester Complete Upper Receiver with Flash Hider made-in-usa-flag Aero Precision M5 18in .308 Winchester Complete Upper Receiver with Flash Hider (5) List: $920.00 (Save 27%) $669.99 Blazin' Deal
Image of Black Rain Ordnance Milled Upper Receiver 1 of 3 models Black Rain Ordnance Milled Upper Receiver (2) $379.00
Image of CMMG Mk3/.308WIN Upper Receiver Assembly 6 models CMMG Mk3/.308WIN Upper Receiver Assembly List: $429.99 (Save 23%) $329.99
Image of Bear Creek Arsenal BC-10 .308 16in Right Side Charging Upper Receiver 3 models Bear Creek Arsenal BC-10 .308 16in Right Side Charging Upper Receiver As Low As (Save Up to $20.06) $369.99
Image of Next Level Armament AR-10 .308 Caliber Upper Receiver 2 models Next Level Armament AR-10 .308 Caliber Upper Receiver As Low As (Save Up to $16.00) $189.00
Image of Luth-AR DPMS LR308 .308 A3 Assembled Upper Receiver w/ Charging Handle Luth-AR DPMS LR308 .308 A3 Assembled Upper Receiver w/ Charging Handle (1) List: $179.99 (Save $10.80) $169.19
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