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Product Overview

ADEP 300 aac - ATAC Defense Enhanced Pistol 7.5" Barrel - "The Enhanced AR Pistol" by ATAC Defense.

Our enhancement modifications make this pistol a dream to operate and shoot.

  • 5.60lbs
  • OAL:  21.8-25.8 inches 
  • Lifetime Limited Warranty

Enhancements include: single stage 3.5lb drop in trigger, anti-walk pins, ambi safety, ambi mag release with oversized mag button, oversized bolt release, oversized ambi charging handle, and nickel boron coated bolt carrier group, MFT engage grip, Maxim Defense PDW pistol brace

At ATAC Defense: quality, reliability, accuracy and fit/finish are our greatest concerns.
We believe in holding a quality level that is far above "mil-spec". All of our components are hand picked and tested by the marksmen that design our firearms.

Our upper and lower receivers are machined "in-house". We perform this critical task ourselves so we can insure proper fitment, without slack and rattle.

Each ATAC Defense firearm is hand assembled with our inspected, tested and approved components.

After assembly, each firearm goes through a test fire session and is re-inspected. Each firearm must pass our final inspection before it can be shipped to the customer.

This product can only be shipped to a valid FFL holder.
When ordering, please enter your FFL's address into the shipping field. Include their contact email or phone number in the notes field so we can exchange FFL's.


  • LOWER RECEIVER: CNC Machined from 7075-T6 Forging, Mil-Spec with Flared Magazine Well, Broached Magazine Well, Ambi Bullet Markings, Threaded Bolt Catch, Captured Rear Detent, Cerakote Finish
  • UPPER RECEIVER: CNC Machined from 7075-T6 Forging, Mil-Spec with M4 Feed Ramps, Cerakote Finish
  • BOLT CARRIER GROUP: M16 Profile, Mil-Spec MP/HP Tested, Properly Staked 4130 Gas Key,8620 carrier, 4340 cam pin, 8640 firing pin, 4340 extractor, S7 ejector, Nickel Boron Coated
  • BARREL: 4150 CrMoV barrel per *Mil-B-1159SE 1:8 Twist, 7.5" Government Profile, HP/MPI Tested, 300AAC chamber, 6 groove button rifled, .750 diameter at gas block, 5/8x24 thread, nitride coated.
  • MUZZLE DEVICE: Muzzle Brake
  • GAS SYSTEM: Low Profile CNC Machined 4140 Hardened Steel Phosphate Coated gas bock, Direct Impingement, 304 stainless steel gas tube
  • BUFFER: Maxim 3.8, Maxim spring
  • HANDGUARD: 6061 Free Float, Using Knurled Barrel Nut, M-Loc attachment points, Cerakote Finish
  • CHARGING HANDLE: 7075 Aluminum Ambi, Type III Hardcoat Anodized
  • PISTOL BRACE: Maxim Defense PDW Brace
  • PISTOL GRIP: MFT Engage 15 degree
  • TRIGGER 3.5lb single stage (curved or straight options)



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  • 5
    ADEP 7.5 300bo

    Posted by Tucker R. on Feb 28th 2022

    I bought this gun specifically for home defense. It has become my favorite in my collection.

  • 5
    7.5 300 blackout pistol

    Posted by Simon on Feb 25th 2022

    I just received this last week. I have put 200 rounds through it so far. I am very pleased with this purchase!