For your AR15, M16, M4. Carbine receiver extension (buffer tube) machined from 7075T6 and manufactured to Mil-Spec dimensions and specifications. Mil-Spec receiver extensions have a slightly smaller dimension where the stock slides on.

Hard Coat Anodized per Mil-A-8625F, Type III, Class 2

These tubes should be used with stocks such as USGI, BCM®, Colt, LMT, SOPMOD, VLTOR, Stag Arms, Magpul CTR (Milspec), and others that a made to the Mil-Spec size.

The BCM Mil-Spec Receiver Extension is manufactured from 7075 T6 aluminum and is given a hard coat anodized finish.

SKU: BCM-Milspec-RE

For more information visit: https://bravocompanyusa.com/bcm-milspec-carbine-receiver-extension-buffer-tube-6-position/