Utilize your space your way with the revolutionary Square-Lok modular organizing system. Square-Lok accessories lock in easily and hold firmly for countless storage configurations. Choose the pieces you need and the arrangement that works best for you.

The Hornady Security® Square‑Lok™ AR Upper Receiver Mount provides a simple, secure way to organize and store spare AR upper receivers on a Square‑Lok™ panel. Its all‑steel construction attaches at the upper receiver’s rear takedown pin lug, creating a solid mounting point that drops securely into the Square‑Lok™ system. Sold in a convenient three‑pack, it helps keep spare uppers organized, protected and readily accessible.

Utilize your space your way with the revolutionary Square-Lok modular organizing system. Square-Lok accessories lock in easily and hold firmly for countless storage configurations. Choose the pieces you need and the arrangement that works best for you.

Utilize your space your way with the revolutionary Square-Lok modular organizing system. Square-Lok accessories lock in easily and hold firmly for countless storage configurations. Choose the pieces you need and the arrangement that works best for you.

Utilize your space your way with the revolutionary Square-Lok modular organizing system. Square-Lok accessories lock in easily and hold firmly for countless storage configurations. Choose the pieces you need and the arrangement that works best for you.

Utilize your space your way with the revolutionary Square-Lok modular organizing system. Square-Lok accessories lock in easily and hold firmly for countless storage configurations. Choose the pieces you need and the arrangement that works best for you.