Description
The MDT Buffer Tube for Carbine Stocks (part 100567-BLK) is a mil-spec-diameter carbine receiver extension, hard anodised black, for fitting a collapsible AR-pattern stock to an MDT chassis or an AR15 lower. MDT notes all its chassis systems can be configured to take this tube, so it is the standard way to run a Magpul, B5, MDT SCS/CCS or other mil-spec carbine stock on an ESS, LSS, LSS-XL, TAC21 or Oryx chassis. Secure it with an end plate and the MDT castle nut (100222-BLK), sold separately.
Key features
- Mil-spec diameter carbine buffer tube (receiver extension)
- Hard anodised black finish
- Fits collapsible mil-spec carbine stocks
- Configurable onto all MDT chassis systems; fits AR15 lowers
- Pair with an end plate and MDT castle nut 100222-BLK
- MDT part number 100567-BLK
Frequently asked questions
Is it mil-spec or commercial diameter?
Mil-spec, so it takes mil-spec carbine stocks such as Magpul CTR/MOE, B5 and MDT SCS/CCS.
Does it include the castle nut and end plate?
MDT lists the tube only; the castle nut (100222-BLK) and end plate are sold separately.
Which MDT chassis does it fit?
MDT states all its chassis systems can be configured to accept this tube.
Specifications from MDT (mdttac.com).
Firearm parts and accessories are supplied by 3 Gun Tactical, Licensed Firearms Dealer 50001578, Tingalpa QLD. No licence is needed to buy chassis accessories, rails or hardware, but check your state’s firearm-parts rules before ordering.





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