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Brownells 75th Anniversary - A Shooting Heritage
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M4 Upper Receivers

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AR-15 M4 UPPER RECEIVERS M-LOK 5.56MM

BROWNELLS

(In Stock)

$299.99 - $389.99

3.0 (2)
M4E1-T ATLAS S-ONE COMPLETE UPPER RECEIVERS 11.5" 5.56MM

AERO PRECISION

(In Stock)

$389.99

5.0 (2)
AR-15 M4 BUILD KIT M-LOK 5.56MM

BROWNELLS

(In Stock)

$529.99

0.0
AR-15 COMPLETE UPPER RECEIVER .223 WYLDE

GREAT LAKES FIREARMS AND AMMUN

(In Stock)

$559.00

0.0
M4E1 ASSEMBLED UPPER RECEIVER .300 BLACKOUT BLACK

AERO PRECISION

(In Stock)

$399.49 - $450.49

5.0 (1)
M4E1 ASSEMBLED UPPER RECEIVER 5.56 MID-LENGTH

AERO PRECISION

(In Stock)

$429.24 - $437.74

4.0 (1)
M5E1 ASSEMBLED UPPER RECEIVER 6.5 CREEDMOOR BLACK

AERO PRECISION

(In Stock)

$590.74 - $607.74

5.0 (2)
M4E1 ASSEMBLED UPPER RECEIVER 16" 5.56 CARBINE LENGTH

AERO PRECISION

(In Stock)

$433.49

4.0 (1)
M4E1-T ATLAS R-ONE COMPLETE UPPER RECEIVERS 10.5" 5.56MM

AERO PRECISION

(In Stock)

$390.99 - $412.24

5.0 (1)
M4E1 ASSEMBLED UPPER RECEIVER 18" 5.56 RIFLE LENGTH

AERO PRECISION

(In Stock)

$446.24

0.0
M4E1 ASSEMBLED UPPER RECEIVER 10.5" 5.56MM CARBINE LENGTH

AERO PRECISION

(In Stock)

$395.24 - $420.74

5.0 (2)
M4E1 ASSEMBLED UPPER RECEIVER .223 WYLDE BLACK

AERO PRECISION

(In Stock)

$463.24 - $475.99

5.0 (1)