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CMMG Mk4LE Upper Receiver Group 5.56mm 55BE1F0

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CMMG, Inc.
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Typically ships the same business day when ordered before 4pm CST.
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CMMG Upper Receiver Group, Mk4LE, 5.56mm

The iconic Mk4LE Upper Group is available in 5.56x45mm, 300 AAC BLK, 9mm Luger and 22LR. They all feature a nitrided 16.1" 4140 CrMo steel barrel in a M4 profile except the 300 BLK as it features a M300 multi-role barrel profile. The standard configuration includes a F marked front sight base.

Features and Specifications:
Manufacturer Number: 55BE1F0
Caliber: 5.56x45mm NATO Chamber
Barrel: 16" M4 Profile Barrel, Salt Bath Nitrided 4140 Chrome-Moly Steel, 1:7" Twist
Hand Guard: M4 Hand Guard
Sights/Gas Block:F Marked Front Sight Base
Bolt Group: M16 Bolt Group

Item#: ARR-118-017
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