Strike Industries SI AR End Plate II FDE — TRIBUS

The Strike Industries TRIBUS (SI AR End Plate II) is an enhanced AR castle nut and extended end plate assembly finished in Flat Dark Earth anodize. It adds two additional QD mounting points to the left and right sides of the extended end plate for a total of three QD sockets, positioning them rearward to reduce interference with the primary support hand. The TRIBUS also upgrades the castle nut with an anti-rotation feature and includes a set screw to help prevent the nut from loosening during use. Available in an anodized color line, the TRIBUS is intended for users who want expanded sling attachment options and improved hardware retention on AR-style buffer tube assemblies.

Key Specifications

• The end plate provides 3 QD mounting points (center, left and right) for flexible sling attachment.
• Includes an anti-rotation castle nut plus a set screw to help prevent the castle nut from backing out during use.
• The listed finish is Flat Dark Earth Anodized.
• Swivel studs are specified as Ambidextrous to support left- or right-sided sling attachment.
• Installation/texture type is listed as Drop In per manufacturer attributes.
• Rails/appearance entry is listed as Flat Dark Earth Anodized in the product attributes.
• The product line/name is listed as Tribus (TRIBUS enhanced end plate).
• Manufactured by Strike Industries.
• The TRIBUS is offered as part of an anodized color line, including FDE.

Compact and practical, the TRIBUS end plate and enhanced castle nut give shooters additional mounting flexibility and a more secure castle-nut interface without altering basic buffer-tube function. Its rearward QD placements and anti-rotation features suit applications where quick sling attachment options and dependable hardware retention are priorities.