Maxim Defense Industries CQB Buffer & Spring - STD - 3.3 oz. Silver/Blue. The Maxim CQB Buffer & Spring Set is offered in different weights to accommodate the application. The Maxim Defense Industries CQB Buffer & Spring Standard/Carbine Set is a weighty buffer and spring set up for the Maxim CQB Stock. Designed for use with the Maxim Defense CQB Stock the Maxim Defense Industries CQB Buffer & Spring Standard/Carbine Set is a great way to make sure you have a durable and efficient buffer and spring set up. Specifications for Maxim Defense Industries CQB Buffer & Spring Set: Manufacturer: Maxim Defense Industries Color: Silver/Blue Fabric/Material: Tungsten Included Accessories: Buffer and Spring Condition: New Country of Origin: USA Package Contents: Maxim Defense Industries CQB Buffer & Spring Set Maxim Defense Industries MXM-47564: CQB Buffer & Spring - STD - 3.3 oz. Silver/Blue