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Mega Arms Standard Billet Upper Receiver


Mega Arms SBU Billet Upper Receiver with Side Charging Slot

Mega Arms MKM AR15 Keymod Upper Receiver

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Quick Overview

No more compromises.

Availability: Out of stock

Regular Price: $399.95

Special Price $379.95


Mega KeyMod AR-15 (MKM-AR15) two piece upper receiver & hand-guard.
Compatible with all standard KeyMod accessories.
Two piece, precision fit design.
The strength and durability of a billet upper combined with a sturdy lightweight extruded hand-guard.
Ultra lightweight design.
Compatible with any Mil-Spec Lower, but designed to best fit the MEGA GTR-3H Billet Lowers.
The AR-15 MKM has an interior dimension of 1.6 inches and is designed to allow for a sound suppressor to be mounted under the hand guard.
Includes upper and hand-guard and comes with dust cover door installed, assembly screws, one 9 slot rail, barrel nut & wrench.
Comes standard with laser engraved “T” numbers.
Black hard anodized with a surface hardness of 60 Rockwell.
Inside Diameter of Hand Guard is ~1.550"


MKM-220-HA (Carbine Length) 19.9 oz
MKM-320-HA (Mid Length) 21.2 oz
MKM-420-HA (Rifle Length) 23.5 oz
MKM-520-HA (Extended Rifle Length) 24.5 oz


MKM-220-HA (Carbine Length) 7 Inches
MKM-320-HA (Mid Length) 9 inches
MKM-420-HA (Rifle Length) 12 inches
MKM-520-HA (Extended Rifle Lenth) 14 inches

Additional Information

Status Complete
M4 Feedramps Yes
Material 7075
Color Black

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