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Fortis Manufacturing
Overview
The Fortis Castle Nut and End Plate is designed to provide a secure attachment point for your AR-15's buffer tube, featuring a quick disconnect (QD) design that allows for easy sling attachment and detachment. The hardcoat anodized black finish not only enhances durability but also offers a sleek, tactical appearance. This component is commonly found in builds chambered for 300 Blackout, where reliability and quick adaptability are essential.
Builders on GunPartPicker first added the Fortis Castle Nut and End Plate, Black, Anodized Finish QD to a build in March 2026.
Today none of the 2 retailers we track has it in stock right now. Listed prices start at $20.99 at Optics Planet for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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