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by PepeTactical, from CA, United States Asked on April 24, 2022
The AT3 Tactical AR-15 Mil Spec Buffer Tube is compatible with Mil-Spec endplates and castle nuts. The Magpul PRS Lite Stock is also compatible with Mil-Spec endplates and castle nuts so the ones listed at the link below will work.
https://www.opticsplanet.com/at3-tactical-castle-nut-for-ar-15-buffer-tubes.html
https://www.opticsplanet.com/at3-tactical-mil-spec-end-plate-for-ar-15.html