Maxim Defense Industries CQB Stock Gen 6 for AR-15 Standard Buffer/Spring 3.3 oz Black. No buttons to push just pull the stock to deploy. At its most collapsed position this CQB stock only adds 5.35 to your AR15. At full extension the Maxim CQB stock is the length of an extended 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. Specifications for Maxim Defense Industries CQB Stock Gen 6 for AR-15: Manufacturer: Maxim Defense Industries Gun Model: AR-15 Gun Type: Rifle Number of Sling Points: 2 Weight: 18.59 oz 3.3 oz 18 oz Length: 5.375 - 10 in Additional Features: Proprietary CQB Buffer Tube 5.375 inch closed 6.875 inch 1st position 8.375 inch 2nd position 10 inch fully extended. Condition: New Hand: Ambidextrous Country of Origin: USA Fabric/Material: 7075 Aluminum Package Contents: Maxim Defense Industries CQB Stock Gen 6 for AR-15 What firearm models does the manufacturer say Maxim Defense Industries CQB Stock Gen 6 for AR-15 is compatible with? The manufacturer says that Maxim Defense Industries CQB Stock Gen 6 for AR-15 is compatible with AR-15Maxim Defense Industries MXM-47502: CQB Stock Gen 6 for AR-15 Standard Buffer/Spring 3.3 oz Black