Strike Industries TRIBUS Enhanced Castle Nut and Ext End Plate for AR-15 Rifle, FDE

Strike Industries TRIBUS Enhanced Castle Nut and Ext End Plate for AR-15 Rifle, FDE - Castle Nut - view 1
Buy Now

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.

Specifications

MPNARECN&EEPFDE
TypeEnhanced
ColorFDE
Material7075-T6 Aluminum

Available Merchants(3)

Price Alert

Log in to set a price alert on this product.

Classic Firearms logo
Classic Firearms
Shipping calculated at checkout
Shipping Speed
In Stock
$60
BattleHawk Armory logo
BattleHawk Armory
Shipping calculated at checkout
Shipping Speed
In Stock
$60
Palmetto State Armory logo
Palmetto State Armory
Free shipping over $99
Shipping Speed
In Stock
$60

Builds Featuring This Part

See all 13

Builds in the community that include the Strike Industries TRIBUS Enhanced Castle Nut and Ext End Plate for AR-15 Rifle, FDE

BuildPartsTotal
10" 5.56
32$7199.62
DMR 16" 5.56
29$3986.88
harrington & richardson 16" build
22$2400.06
aero precision 30"
31$2884.41
11.5" anderson manufacturing carbine
18$1315.54
16" spike's tactical SBR
32$2267.60
Second 5.56 build
26$3038.62
new 5.56 build
24$2241.66
Home defense 16" 5.56
24$3501.37
wilson combat 16" build
30$4629.95
For the range mostly 16.5"
20$1232.86
SBR 17.7"
22$1230.46

Customer reviews

5.0out of 5

2 global ratings

Review this product

Share your thoughts with other customers

Write a customer review

Top reviews

N
Ninch232_53
Tribus FDE matches Magpul
Reviewed on April 30, 2026Verified with Build

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.

|
R
rompe123_223
TRIBUS in FDE
Reviewed on March 17, 2026Verified with Build

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

|