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93070 - AR-15 Receiver Extension Tube (mil-spec)

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AR-15 Receiver Extension Tube (Mil-Spec)

Carbine receiver extension (buffer tube) is manufactured to Mil-Spec dimensions and specifications. Mil-Spec receiver extentions have a slightly smaller dimension where the stock slides on. These tubes should be used with stocks such as USGI, SOPMOD, and others that a made to the Mil-Spec size.

The Receiver Extension Tube (mil-spec) is available separately or as part of complete telescoping stock kits.


The optional hydraulic recoil buffer tube takes the place of the receiver extension tube, converting the AR-15 telescoping stock into a recoil-buffered stock assembly without further modification. The recoil buffer reduces up to 70% of felt recoil. Recoil-buffered versions are available for all three of the telescoping stock systems, or the recoil buffer can be purchased separately. The recoil buffer accepts mil-spec dimensioned buttstocks. The Kyntec hydraulic recoil buffer is CNC machined from 6061-T6 aluminum and meets the stringent standards of military and law enforcement users. Our basic kits include the adapter and all necessary installation hardware. No gunsmithing is required for installation.