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CMMG AR-15 Mk4T Complete Upper Receiver .300 AAC Blackout 16" Barrel Keymod Handguard Black 30B129A
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Brand: CMMG, Inc. 30B129A
Item: 7-30B129A
UPC: 815835015972

When affordability, quality, and modularity are all mission essential, the CMMG Mk4T is the complete upper of choice. The Mk4T upper introduces CMMG's revolutionary RKM KeyMod series of free floating hand guards. Sporting an 11" RKM hand guard and a 16" nitrided 4140 CrMo steel barrel, this tactically inspired upper is ready to attach to any standard AR-15 lower receiver.

Specifications and Features:
.300 AAC Blackout
Medium taper profile
A2 Muzzle device
RMK11 Handguard
Bolt carrier group
Charging handle
1:7 Twist rate
Forged 7075-T6 receiver

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Customer Reviews

Most Helpful Customer Reviews

1 of 1 people found the following review helpful
5.0 Rating Love this upper! - 7/12/2014
Reviewer: ar builder
I love this upper. I took it to the range today for the first time to sight in with iron sights. It cycles great on my standard mil-spec lower (carbine buffer). My shots were perfect circles (no key-holing) at 10 yd, 25 yd, and 50 yd. I was shooting 220 gr. subsonic Remington ammo. The only thing I might change is I might buy a better bolt carrier group (nickel boron or EXO coated), but the BCG that comes with this upper is as good as any standard mil-spec BCG. Very pleased with this purchase!
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CMMG AR-15 Mk4T Complete Upper Receiver .300 AAC Blackout 16 Barrel Keymod Handguard Black 30B129A
CMMG AR-15 Mk4T Complete Upper Receiver .300 AAC Blackout 16 Barrel Keymod Handguard Black 30B129A
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