These are new old stock from original Remington in 2016. When they closed down this is a RIGHT HAND LONG ACTION STOCK ADL 401688

The NOS Remington 700 ADL SPS STD Long Action Black with Recoil Pad and Studs #401688 is a high-quality stock and forend part designed for Remington rifles. Made of durable synthetic material, this black-colored stock is specifically designed for long action rifles. Manufactured in the United States by Remington, this product ensures a perfect fit and reliable performance for your hunting or shooting needs.