Modern Carbine – MC6 300BLK Folding Brace Pistol – 6″

$1,574.99 $1,295.99

Brace Built Modern Carbine 6300BLK Folding Brace– The MC6 is proof that you can build a lightweight AR15 in 300BLK that is still reliable, durable, and has all of the accents and styling you expect from a premium firearm. Currently in use at over 80 police departments in the USA and with over 3,000 discerning customers, the MC6 combines only the best components including an upper receiver, lower receiver, and proprietary, slimline, MLOK™ compatible hand guard machined in house from billet, high performance barrels, and specially selected components. Comes standard with a SilencerCo™ ASR flash hider, 6” barrel, and Cerakoted from the factory (upper, lower and hand guard) in your choice of burnt bronze, OD green, tungsten, and flat black.

Includes – Soft case, one black Magpul™ 30 round magazine.


$1,574.99 $1,295.99

Burnt Bronze Flat Black Olive Drab Tungsten
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The MC6 300BLK Pistol is reliable, durable and has all the accents and styling you expect from a premium firearm.  The MC6 Pistol comes with a 6” Ballistic Advantage Performance Series barrel and custom billet handguard all made in the great state of Texas.  This pistol is compact with a Sylvan Arms folding adapter with SB Tactical SBM4 Pistol Brace.  The small package pistol comes with a tactical backpack for easy transport. All MC6 products are loaded with Timney Competition Triggers, ambidextrous controls and Radian charging handle.  Brace Built takes no shortcuts and every pistol and rifle comes with a LIFETIME Warranty.  Built in Texas.  Made in the USA.


  • Mag Well: Wire EDM flared magazine well with accents.
  • Gas System: Pinned low profile gas block, gas key with rounded leading edges ensuring positive functioning in all makes and grades of uppers and buffer tube combinations.
  • Bolt Carrier Group: Azimuth™ Bolt Carrier Group and bolt. Rounded cam pin rides in a fully chamfered cam path. Properly staked and torqued grade 8 hex screws as per the true Mil-Spec. Carrier body OD and ID are hard turned after heat treat to +/- .0005 inches. Bolt lugs are machined with the proper radius as per true Mil-Spec tolerances. Independent HP white proof testing exceeded over 90,000 PSI without failure. Outer diameter machined to all critical surfaces within +/- .0005 inches. QPQ Melonite Finish.
  • Charging Handle: Radian™ Ambidextrous Raptor – LT
  • Safety: Ambidextrous Radian Talon
  • Bolt Catch: Seekins™ Enhanced
  • Mag Release: Seekins Billet
  • Buffer tube: Maritime™
  • Buffer: H2 Buffer
  • Stock: SB Tactical SBM4 with Sylvan Arms Folding Adapter
  • Grip: MagPul MOE® Grip
  • Receivers: Lightweight, custom matched billet upper and lower receivers, monolithic top rail
  • Caliber: .300BLK
  • Trigger: Timney™ Competition Trigger
  • Barrel: 6” Ballistic Advantage™ Performance series 300BLK barrel (machined from 4150 Chrome Moly Vanadium Steel and feature a QPQ Corrosion Resistant Finish and Nickel Boron Coated M4 Feed Ramp Extension. All Performance Series Barrels are HP and MPI tested)
  • Handguard: 6” low profile Modern Carbine™ monolithic free float M-LOK® handguard with proprietary barrel nut
  • Muzzle Device: SilencerCo™ ASR flash hider
  • Weight: 5.2 lbs
  • Warranty: All Brace Built Products come with a Lifetime Warranty.

Additional information






Burnt Bronze, Flat Black, Olive Drab, Tungsten