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Strike Industries
Overview
The Strike Industries TRIBUS Enhanced Castle Nut and Extended End Plate is designed to provide a more secure and stable attachment point for your stock, thanks to its enhanced design. Crafted from 7075-T6 aluminum, this component ensures durability while maintaining a lightweight profile, which is important for overall build efficiency. This part is commonly found in builds utilizing a mid-length gas system chambered in 5.56 NATO, making it a reliable choice for those configurations.
Strike Industries TRIBUS Enhanced Castle Nut and Ext End Plate for AR-15 Rifle, FDE
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Builders on GunPartPicker first added the Strike Industries TRIBUS Enhanced Castle Nut and Ext End Plate for AR-15 Rifle, FDE to a build in January 2026.
Availability is good: it was in stock at one retailer or another nearly every day in August 2026, and today all 3 retailers we track have it in stock. Prices barely moved in August 2026, holding around $59.95, so there haven't been real sales lately. Buying today, the lowest price is $59.95 at Classic Firearms, which matches the best price we saw in August.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 31 retailers
Builds in the community that include the Strike Industries TRIBUS Enhanced Castle Nut and Ext End Plate for AR-15 Rifle, FDE
| Build | Parts | Total |
|---|---|---|
 | 32 | $7083.71 |
 | 29 | $3878.08 |
 | 22 | $2397.98 |
 | 31 | $2986.84 |
 | 18 | $1289.90 |
 | 32 | $2551.68 |
 | 26 | $3112.22 |
 | 24 | $2009.77 |
 | 24 | $3878.55 |
 | 30 | $4765.48 |
 | 20 | $1217.98 |
 | 22 | $1150.40 |
2 global ratings
Top reviews
Strike Industries Tribus enhanced castle nut and end plate in FDE matches my Magpul FDE parts well. Larger wrench notches torque easier than mil-spec castle nuts. End plate has integrated QD recessed into the body for a clean profile.
extended end plate doubles as a QD socket on both sides which is great for ambi sling users. castle nut has SI cuts that fit their armorers wrench but a standard works too. FDE is a brighter tan than magpul
