Like the Gen 6, the Gen 7 is a CQB stock 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 CQB stock only adds 5.35" to your AR-15. At full extension, the Maxim CQB stock is the length of a standard extended M4 carbine stock. And with 4 total positions you can adjust for maximum comfort and multiple scenarios. Rapid deployment, purpose driven materials, and the functionality you need, the Maxim Defense CQB Stock is simply the most thought out, versatile, and durable CQB stock on the market. The Gen 7 is for those who want a sleeker profile, eliminating the side sling swivel attachment points from the housing. Instead, the Gen 7 comes with an ambidextrous sling mount end plate already installed. This stock assembly comes with a standard weight proprietary buffer, buffer spring and buffer tube. Not compatible with standard AR-15 buffer tube assembly components.