The Strike Industries Optimus Modular Weight Buffer provides rapid modular customization that can be performed by the user. Changing out the buffer is one of the most direct upgrades to the AR platform. The Optimus Modular Weight Buffer comes with standard H1-H3 weight distribution, or it can be adjusted to the specific weight needs of the shooter. The Optimus will increase the reliability, accuracy, and performance of the AR shooting platform. FeaturesRapid take down and configurationDurable 7075 aluminum constructionO-ring to keep the buffer head from walking outStandard/ H1/ H2/ H3 weight configuration or user needsOptimal size and weight for increased reliability, accuracy and performance for AR-15 platformNumerous weight configuration for more accurate setting (used for multiple calibers, gas system, suppressed, rapid fire, and etc)