Alpha Foxtrot M13 KeyMod 5.56 AR Upper – 16″ w/BCG and CH

(11 customer reviews)


Assembled from high-quality components, the M13 KeyMod hybrid upper is chambered in 5.56 with a 1 in 8″ twist and utilizes a Mid-length gas system for smooth shooting.   The ergonomic 13″ slim, hybrid KeyMod rail free-floats the barrel for accuracy.  Features 4 QD point options for mounting a sling loop, and built-in rail sections at the 3, 6, and 9 positions located at the end of the handguard, where they are most needed.   Keymod slots are available to allow for other accessories if preferred. The 4150 steel barrel is melonite treated for accuracy and durability and is finished off with an A2-style muzzle device.   Carpenter 158 bolt is tested.  Optics ready.

Out of stock

Categories: ,
Additional Information
Weight5 lbs
Dimensions26 × 2.5 × 2.5 in
Barrel Length


Barrel Material

4150 Chrome Moly Vanadium

Barrel Profile

A2 Style

Barrel Finish



AR – 5.56 x 45 NATO



Receiver Material

7075 T6 Aluminum

Receiver Type


Receiver Finish

Mil-Spec Anodized


Hard Engranved / Hand Painted


13" KeyMod Hybrid Free-Float

Gas Length


Gas Block

Low Profile

Gas Block Diameter


Muzzle Thread

1/2" – 28

Muzzle Device Type



Carpenter 158, Tested

Bolt Carrier

Semi-Auto profle

Charging Handle

Mil-Spec 7075 T6

Reviews (11)

11 reviews for Alpha Foxtrot M13 KeyMod 5.56 AR Upper – 16″ w/BCG and CH

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