The Kaw Valley Precision Thread Adapter, 13.5×1 LH to 1/2×28 (Kaw Valley Precision part no. KVPADPT1312) converts a barrel cut with the left-hand 13.5×1 thread pitch, common on some AK-pattern and other imported rifles, to accept standard 1/2×28-threaded muzzle devices and mounts. Left-hand threaded barrels can otherwise limit shooters to a much smaller selection of muzzle devices, so this adapter opens up compatibility with the far more widely available 1/2×28 accessory market. Kaw Valley Precision machines the adapter to hold tight tolerances so the mounted device sits square and concentric to the bore. It’s a practical fix for shooters wanting more muzzle device options on a left-hand threaded host barrel.

Key Specifications

• Converts 13.5×1 left-hand threading to accept 1/2×28-threaded muzzle devices.
• Machined to hold tight tolerances for a concentric, square mount to the bore.
• Installs by hand-threading onto the barrel’s existing muzzle threads.
• Sold as a standalone adapter, not bundled with a muzzle device.
• Machined from durable metal for repeated mounting and removal.

Frequently Asked Questions

Why do some barrels use left-hand threading? Left-hand threading is used on certain platforms specifically to prevent a muzzle device from unscrewing under the direction of bolt rotation or recoil.

Does this adapter let me use standard right-hand muzzle devices? Yes, once installed, it presents standard 1/2×28 right-hand threading for common muzzle devices.

Buy the Kaw Valley Precision Thread Adapter, 13.5×1 LH to 1/2×28

Shop the Kaw Valley Precision thread adapter in our other gun accessories and parts selection, with fast, insured shipping from our Lubbock, Texas gun shop.