Make: CMMG
Model: MK-4
Serial Number: SCH005156
Year of Manufacture: 2004-2016 / ATF Classification: Modern
Caliber/Gauge: .300 AAC Blackout
Action Type: Semi automatic, direct impingement, carbine length gas system
Barrel Length: 16", 1:7 twist
Sights/Optics: There are no iron sights currently mounted. There are sections of picatinny located on top of the gas block and upper receiver. An NcSTAR 2-6x28mm scope is mounted. The glass is clear and the scope rates in Very Good condition.
Grip/Stock Configuration & Condition: The furniture consists of a collapsible carbine stock, A2 pistol grip, fat clamshell handguard, and A2 flash hider. The are no notable handling marks on the furniture. There are no chips or cracks. The furniture rates in Excellent condition.
Type of Finish: Matte black
Finish Originality: Original
Bore Condition: The bore is bright and the rifling is sharp with copper fouling. There is no erosion in the bore. In this writer's opinion, the bore rates 9.5/10.
Overall Condition: This rifle retains about 98% of its original finish. There are some "300 BLK" marks on the left and right of the lower as well as some other minor surface blemishes. The receiver pins are unmarred and remain functional. The markings are clear and complete. Overall, this rifle rates in Fine Plus condition.
Mechanics: The action functions correctly. We did not fire this firearm. As with all used firearms, a thorough cleaning may be necessary to meet your maintenance standards.
Box, Paperwork & Accessories: Scope and one 30rd MFT magazine
Our Assessment: This CMMG MK-4 is a semi-automatic AR-15 pattern rifle chambered in .300 AAC Blackout. Produced by CMMG, the MK-4 is built around the proven direct impingement AR platform and is known for its quality components, reliability, and versatility. Chambering in .300 AAC Blackout makes this rifle particularly well suited for both hunting and defensive applications, especially where heavier bullets or suppressed use are desired.
This rifle is equipped with an NcSTAR 2-6x28mm scope that provides a practical magnification range for close to intermediate-range shooting. The .300 AAC Blackout cartridge offers excellent flexibility with both supersonic and subsonic ammunition while maintaining compatibility with the AR-15 platform. In this writer's opinion, the bore rates 9.5 out of 10, indicating excellent internal condition with strong rifling. The action functions correctly.
The furniture rates in Excellent condition with minimal visible handling wear. This rifle retains approximately 98% of its original finish, presenting a very clean overall appearance. One 30 round magazine is included. Overall, this rifle rates in Fine Plus condition and stands as an attractive CMMG MK-4 package equipped with an optic and chambered in the versatile .300 AAC Blackout cartridge. Please see our photos for a better understanding of condition and good luck with your bids!
