The A3 Industries Triangle Folding Stock adds a cheek rest and buttpad to the aluminum side-folder for a more stable cheek weld, finished in Black.

Key Specifications

• Built with a folding mechanism that lets the stock swing to the side for a shorter overall footprint.
• Measures 9 inches folded for compact storage or transport.
• Adds a cheek rest and buttpad over the standard triangle stock for a higher, steadier cheek weld and a softer shoulder interface.
• Interfaces with a Picatinny rail-style receiver extension rather than a mil-spec/commercial buffer tube.
• Constructed from aluminum for a lighter, more rigid build than the polymer version.
• Classified as a firearm part/accessory, not a regulated firearm itself — no FFL transfer required to purchase.

Frequently Asked Questions

What does the cheek rest add over the standard triangle stock? It raises and stabilizes your cheek weld for a more consistent sight picture, especially with optics that sit higher over the bore.

Does this fold like the standard version? Yes, it uses the same side-folding triangle mechanism, just with the added cheek rest and buttpad.

Does this come in polymer too? Yes, A3 Industries offers this same cheek-rest/buttpad configuration in a polymer version as a separate SKU.

Buy the A3 Industries Triangle Folding Stock 9-inch w/ Cheek Rest & Buttpad, Aluminum

Order the A3 Industries Triangle Folding Stock 9-inch w/ Cheek Rest & Buttpad, Aluminum today for fast, insured shipping from a Lubbock, TX gun shop. Browse more A3 Industries parts in our AR Braces/Stocks category.