Magpul CTR Carbine Stock Commercial-Spec Black #MAG311-BLK

The Magpul CTR (Compact/Type Restricted) – Commercial-Spec Model is a drop-in replacement buttstock for AR15/M16 carbines using commercial-spec sized receiver extension tubes. Designed for light, fast action the streamlined A-frame profile avoids snagging and shields the release latch to prevent accidental activation. The CTR also features a supplemental friction lock system that minimizes excessive stock movement for enhanced weapon stability* and an ambidextrous QD sling mount that will accept any push-button sling swivel. The Commercial-Spec Model includes an extended 0.55" rubber butt-pad to provide positive shoulder purchase and accommodates the longer, slanted back common to most commercial-spec tubes.


  • Black Finish
  • Mounts on commercial-spec sized carbine receiver extension tube (not included) from manufacturers such as Bushmaster, DPMS, Olympic, and others (please see the note below)
  • Supplemental friction lock minimizes accuracy robbing wobble*
  • Sloping cheek weld combines a slim profile with user comfort
  • Shielded release latch prevents snagging and accidental operation
  • Premium chrome-silicon lock spring provides positive locking and long service life
  • Side mounting slots accept optional cheek risers for NON-AR15/M16 applications
  • Replaceable 0.55" Extended Rubber Butt-Pad offers an anti-slip surface and increases impact protection
  • Compatible with Magpul ASAP® and other receiver-mount sling attachments
  • Sling Mounts
    • Rear - Push-button QD swivel sling mount accommodates up to 1.5" swivels (ambidextrous)
    • Rear/Bottom - 1.25" sling loops
    • Toe - Lanyard hole for custom para-cord rigs
  • Made in U.S.A.


  • Weight: 0.58 lb.
  • Weight, w/ Rec. Extension: 0.91 lb.
  • Length
    • Maximum: 7.15 in.
    • LOP Adjustment Range: 3.80 in.
    • LOP, M4 Collapsed: 10.95 in.
    • LOP, M4 Extended: 14.75 in.
      NOTE: There are two basic sizes of M4 Carbine receiver extensions (buffer tubes): mil-spec and commercial-spec.

* Friction lock performance may vary depending on the host receiver extension's dimensional tolerances.

** Specifications based on extended-length (slant-back) commercial-spec carbine receiver extension and may vary depending on tube manufacturer.

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