Fostech Ultra-Light Castle Nut


Make your next build LITE by using a Fostech Ultra-Light Castle Nut. Fostech machined these AR15 Lower Parts from their proprietary lightweight material. Swapping in this Fostech 2505 Lightweight Castle Nut will reduce your build by 0.34oz compared to a standard castle nut. Save weight and keep the strength with the Fostech Ultra-Light Castle Nut.


Approximate Weight: .18 ounces

Material: Aluminum

Additional information


300 BLK, 5.56, 6.5 Grendal

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