CMMG DISSENT Mk4 .300 AAC Blackout AR-15 Pistol, 6.5 in Threaded Barrel, Side-Charging, Black, 30+1
This CMMG DISSENT Mk4 is a recent, bufferless direct-impingement .300 BLK pistol built around a dual guide-rod recoil system and a Mk4 AR-15 pattern lower. It features a 6.5 in nitrided 4140 steel barrel with 5/8x24 threads, a forward non-reciprocating side charger, and a TriggerTech AR-D 2-stage trigger. Ambidextrous controls, a free-floated aluminum M-LOK handguard, and robust 7075-T6 aluminum construction round out a compact, USA-made package.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: Light handling marks from prior use are present. Please review the photos for a complete view of exterior wear.
What's Included
- 1x 30-round polymer AR-pattern magazine marked "300 BLK"
The DISSENT Mk4 uses CMMG's bufferless compact action with a dual guide-rod recoil system, eliminating the need for a receiver extension while retaining direct-impingement operation. A rear 1913 Picatinny rail end cap is integral to the design.
The 6.5 in barrel is 4140 chrome-moly steel, nitrided for durability, and threaded 5/8x24. It has a 1:7 twist for .300 BLK projectiles and comes with an open-prong muzzle device installed.
Controls and operation are modern and practical: a forward, non-reciprocating side-charging handle, ambidextrous magazine release, and ambidextrous manual safety. The TriggerTech AR-D 2-stage trigger provides a refined fire control setup.
The free-floated aluminum M-LOK handguard and continuous top Picatinny rail support accessory placement, while the Mk4 AR-15 pattern lower keeps parts compatibility straightforward. Construction is 7075-T6 aluminum with a black finish.
Capacity is 30+1 in .300 AAC Blackout. This pistol ships with one 30-round polymer magazine marked "300 BLK" and is manufactured in the USA.