• Will the Modular End Cap system fit my lower receiver?
    • The Modular End Cap System will fit any AR Style Lower Receiver as long as it follows Mil-Spec dimensioning & tolerancing.

  • Can I run any upper with the Modular End Cap System?
    • No, the Modular End Cap System is designed to only work with compact action style systems be it drop-in uppers or drop-in kits that do not extend into the threaded section of the lower receiver. Examples are 22LR Dedicated & Conversion kits, or compact upper receivers like the BRN-180 & BRN-180S.
  • Is the QD End Plate strong enough to hold the weight of my firearm?
    • Our QD End Plate is made of 8620 steel so if you trust aluminum you will have no problem trusting our stronger version.
  • Will my side-folding brace/stock fit onto the Vertical Picatinny End Cap?
    • As long as the brace/stock is designed to fit a standard picatinny pattern mount then you will have no problem attaching to our Vertical Picatinny End Cap.