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CMMG Mk4 T 300 AAC Blackout/Whisper (7.62x35mm) 16" 4140 Steel Blk
Cmmg

CMMG Mk4 T 300 AAC Blackout/Whisper (7.62x35mm) 16" 4140 Steel Blk

UPC 00815835015972

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1 offer · 0 in stock · sorted by best price
RetailerPriceStockLast checkedDeal
Locked & Loaded$600.01Out of stock32m agoGo to deal

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Description

When modularity, affordability, and quality are all important the Mk4 T is the upper of choice. The Mk4 T introduces CMMG's RKM series of KeyMod free float hand guards. This upper sports an 11" RKM hand guard and a nitrided 4140 CrMo steel barrel in a medium taper profile.

Specs

BrandCmmg
CategoriesParts · Parts
Caliber300 AAC Blackout/Whisper (7.62x35mm)
UPC00815835015972
TypeComplete Gas Impingement
ModelMk4 T
Twist1:7"
Series300 Blackout
SightsNone, Optic Ready
IncludesComplete Bolt
HandguardsQuad Rail Keymod
Barrel_finishBlack
Barrel_length16"
Rate_of_twist1:7"
Similar_itemsUpper
Ar_15_accessoryYes
Barrel_material4140 Steel
Receiver_finishBlack
Handguard_finishBlack
Barrel_descriptionMedium Taper
Barrel_length_range16.00" to 17.99"
Receiver_description7075-T6 Aluminum M4
Barrel_length_in_inches16
Package dimensions3.55 x 5.05 x 31.55 in

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D.O.P.E.Price history

Lowest price across connected retailers, from every price check we've recorded.

Current best
$600.01
Low
$600.01
Oct 10, 2026
High
$600.01
Oct 10, 2026
Tracking since
Oct 10, 2026
One price check so far ($600.01 on Oct 10, 2026). The chart fills in as retailers are re-checked.
Recent price checks (1)
DateRetailerPriceStock
Oct 10, 2026, 9:05 PM PTLocked & Loaded$600.01Out of stock

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