• The FAB Defense Black M4 Buttstock has an integrated AR 5.56 magazine carrier, optimized for a rapid magazine change
  • It features a multi-textured, rubber butt-pad and an integrated cheek weld optimized for the M4/AR15 platforms
  • It’s compatible with Mil-Spec and commercial buffer tubes and all standard 5.56x45 AR15/M16/M4 steel magazines

FAB Defense Black M4 Buttstock With Built-In Magazine Carrier - Compatible With Mil-Spec Buffer Tubes, Rubber Butt-Pad

$102.99

In Stock - Ships Today!

Fast and Accurate Order Processing

We offer standard, 3 day express, 2 day express, and overnight express shipping options for your convenience. If you place your order Monday - Friday by 2:00 PM EST using one of our express shipping options, your order will be processed and shipped the same day it is placed!

Applies to delivery within the 48 contiguous states only.
Shopper Award

  • The FAB Defense Black M4 Buttstock has an integrated AR 5.56 magazine carrier, optimized for a rapid magazine change
  • It features a multi-textured, rubber butt-pad and an integrated cheek weld optimized for the M4/AR15 platforms
  • It’s compatible with Mil-Spec and commercial buffer tubes and all standard 5.56x45 AR15/M16/M4 steel magazines
  • Included with the buttstock are ambidextrous, quick-detach rear sling swivel connectors and one Ultimag 10-round AR magazine


The FAB Defense Black M4 Buttstock has an integrated AR 5.56 magazine carrier, optimized for a rapid magazine change. It features a multi-textured, rubber butt-pad for secure shouldering during rapid fire and an integrated cheek weld optimized for the M4/AR15 platforms. The interchangeable buffer tube adapters provide a tight fit on both Mil-Spec and commercial buffer tubes and it’s compatible with all standard 5.56x45 (.223 Remington) AR15/M16/M4 steel magazines. Included with the buttstock are ambidextrous, quick-detach rear sling swivel connectors and one Ultimag 10-round AR magazine.

52 FA6521


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