The Maxim Defense SCW Stock is built for comfort and durability for real-world use. No buttons to push” just pull the stock to deploy. At its most collapsed position” this SCW stock only adds 4.0″ to your AR-15. At full extension” the Maxim SCW stock reaches 8.8 inches. With 5 total positions you can adjust for maximum comfort and multiple scenarios. Rapid deployment” purpose driven materials” and the functionality you need” the Maxim Defense SCW Stock is simply the shortest” most thought out” versatile” and durable SCW stock on the market. This complete kit comes with the SCW stock assembly” a proprietary standard weight buffer and buffer srping” and a shortened bolt carrier group tuned for reliable function with the stock system. Not compatbile with standard AR-15 buffer tube assembly components.