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Battle Arms Development AR-15 Monolithic PDW Lower Receiver + Stock System

AR-15 Complete Lower Receiver

Out of stock

FFL Required Before Shipping.
Please have your dealer email a copy of their FFL to [email protected] or fax it to 253-218-2998, referencing your name and order number.



  • Built-In PDW Stock System
  • Ultra Compact Design - 4.75" Stock Length for Ultimate Concealment
  • Proprietary Ultra Compact Buffer & Recoil Spring System - Compatible with MilSpec M16/AR15 Bolt Carrier 
  • Self Contained Buffer System - No Proprietary Bolt Carrier Required!  Ability to "Shotgun" the Upper
  • Monolithic Engineering - Receiver and PDW Stock Housing Precision CNC From Single Block of Billet 7075-T6 Aircraft Grade Aluminum for Superior Strength and Lightweight Design
  • Interchangeable Cheek Rest for Versitility (Color Cheek Rest Options Available In the Future)
  • Continous Cheek Weld for Ultimate Comfort and Stability/Accuracy
  • Billet CNC Milled 7075-T6 Aluminum Buttstock
  • (1) Build-In, Integral QD Sling Points at Rear of Receiver Stock Housing & Buttstock
  • Heat Treat & Harden S7 Tool Steel .315" Dia. Guide Rods for Ultimate Impact Strength and Durability
  • No Metal-To-Metal Contact between Guide Rods and Receiver Housing 
  • New Industry Standard in Smooth Stock Operation with Linear Motion Guide Bushings
  • (4) Locking Stock Positions - Lockable in Both Direction.  From 4.75" Fully Collapsed to 8.75" Fully Extended (measured from rear of receiver to end of stock)
  • Dimpled Locking Stops with Stainless Steel Ball Bearing & S7 Tool Steel Locking Latch
  • Ambidextrous Bolt Release (hardware included)
  • Ambidextrous Magazine Release (hardware included)
  • MIL-A-8625F, Type III, Class 2, Hard Anodized Flat Black Finish
  • Compatible with TDP/Mil Standard AR Lower Receiver Parts (except for built-in proprietary components)
  • Dimensional Accuracy Inspection
  • All Sharp Edges De-Burred Sharp by Hand
  • Pictograph Selector Markings Properly Marked for 90° Safety or  BAD-ASS-ST / BAD-CASS-SA-ST Short Throw Ambidextrous Safety Selectors
  • Receiver Safety Selector Hole & Internal Wall Machined with Relief Cut for Battle Arms Development "SHORT-THROW / REVERSIBLE" Ambidextrous Safety Selectors
  • Multi Caliber Marking for Build Versatility
  • Flared, Deep Beveled Magwell
  • Easy in Install Set Screw Bolt Catch Pin (Pin Included)
  • Captured Takedown Pin Detent Spring (Set Screw Included)
  • Upper/Lower Receiver Tension Screw (Screw included)
  • Integrated Trigger Guard
  • All Components, material, and packaging made in the USA
  • Laser Engraved Logo
  • Patents Pending: Monolithic Design, Stock Locking Mechanism, and Ultra Compact Buffer & Recoil Spring System


Additional Components Include:

  • BAD-CASS-SA-ST - Combat Ambidextrous Safety Selector - 50°/90° Reversible - Standard & Short Lever
  • BAD-ATG - Battle Arms Development Adjustable Tactical Grip - 3 Grips-In-One - 3 Different Angles
  • BAD-EMMR-L-B - Enhanced Modular Magazine Release - Large Finger Pad - Black 
  • BAD-EPS - Enhanced Pin Set (Enhanced Pivot Pin & Enhanced Takedown Pin)
  • BAD-EBS - Enhanced Bolt Stop - CNC Milled from Billet 17-4 Stainless Steel
  • MilSpec Magazine Release & Spring
  • Bolt Catch Detent & Spring
  • Buffer Detent & Spring



  • Will not work with solid filled 9mm bolt carrier
  • Buffer system is designed for 5.56/.223 direct gas impingement system 
  • Buffer system can work with piston driven AR if the rear, internal dimensions of the bolt carrier is Mil-Spec
  • Use of FAIL ZERO NICKLE BORON Bolt Carrier may cause damage to the buffer system due to the I.D. (Inside Diameter) of the BCG being undersized
  • Inside, rear cavity of the bolt carrier must be .625" diameter x .625" deep minimum to clear the buffer.  Damage may occur if proper clearance isn't met.
More Information
Product Type AR-15 Complete Lower Receiver
Manufacturer Battle Arms Development
Option AR-15