HRF Concepts CAB M3 PMAG Coupler

Original price was: $75.00.Current price is: $70.00.


Product Description

The CAB (Covert Asymmetric Basepad) provides end-users with the lowest vertical profile coupled magazine system on the market. By extending the secondary magazine capacity 5 rounds, the CAB allows for unhindered movement of the dust cover and use of all control surfaces. Intended for use with 20 round M3 Pmags the CAB is ideal for situations in which maximizing the on-platform round count is essential while still maintaining a low profile. The CAB uses the original magazine spring and features a standard floorplate lock for the primary magazine and a friction locking system for the secondary magazine.

*Only compatible with 10, 20, 30, 40, and 300BLK (may require light sanding of the base to fit, detailed in instructions) model M3 generation Pmags. While the CAB is compatible with those options we recommend using a Magpul coupler and plus five basepad of your choice for 30 and 40-round magazines instead of the CAB.*


  • Material: Nylon Polymer
  • Weight: 01.41oz (40g)
  • Weight unloaded with PMAG 20s.
  • Storage: +5 to Left, +0 to Right
  • Included Hardware: 8-32 1″ Set Screw
  • Instructions: Available Here
  • Color: Black
  • Made in the USA



  • Length: 2.90″ (29mm)
  • Width: 2.65″ (29mm)
  • Height: 1.21″ (27mm)


The CAB does not include PMAGs and requires two to function.




Technical Information


Nylon Polymer

Catalog Location

California Prop 65 Warning

WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information visit