Most Popular Upper Receiver for AR-15 / AR-10 / AR-9 Builds in 2026
The top 15 most-used upper receiver in 2026, ranked by how often they appear in builds tracked on AR15.Build. Updated nightly.
The upper receiver houses your barrel, bolt carrier group, and handguard — and its quality directly affects how everything fits and functions together. Most builders choose stripped uppers and assemble their own, but complete uppers are popular for those who want a ready-to-run package.
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Bravo Company BCM4 Upper Receiver Assembly Flat Top With Forward Assist 1913 Rail
5 builds$129.00 - 2
Aero Precision AR15 Assembled Upper Receiver - Anodized Black - APAR501603AC
5 builds$123.99 - 3
LMT Monolithic Upper Receiver - AR-15 - MRP-L - M-LOK - Specwar - 11.5"
3 builds$940.50 - 4
Griffin Armament Mk1 Upper Receiver Assembled Aluminum Black
3 builds$113.95 - 5
Bravo Company 4URM4 BCM M4 Upper Assembly Multi-Caliber 7075-T6 Aluminum Black Anodized Receiver for AR-15
2 builds$137.04 - 6
BCM MK2 Carbine Barreled Upper MCMR-10 - 12.5in
2 builds$820.39 - 7
CMMG Upper Group Resolute Mk4 .300 AAC 14.5in P&W Upper Receiver
2 builds$479.47 - 8
11.5" 5.56 Carbine Length W/9" AR15 S-One M-LOK Handguard Complete Upper
2 builds$445.00 - 9
COLT AR15A4 UPPER RCVR, FLATTOP, MOD. CARB
2 builds$129.99 - 10
AERO PRECISION - 5.56X45 NATO ASSEMBLED UPPER RECEIVER NO AUTO SEAR CUT FOR AR-15
2 builds$129.99 - 11
AERO PRECISION - 5.56X45 NATO ASSEMBLED UPPER RECEIVER NO AUTO SEAR CUT FOR AR-15
2 builds$119.99 - 12
Aero Precision M4E1 Assembled AR-15 Upper, Threaded, FDE Cerakote
2 builds$155.99 - 13
AR15 Assembled Upper Receiver - Kodiak Brown Anodized
2 builds$98.00 - 14
COLT Monolithic AR-15 Pistol Complete Upper Receiver 5.56x45 NATO 11.5" Barrel
1 build$1,103.99 - 15
Geissele Super Duty MOD1 5.56 NATO 13.9in 1:7 CHF Chrome-Lined P&W Complete Upper
1 build$1,269.99
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