USA made 5.56/.223 buffer spring for AR-15 type rifles. Making sure your AR15 variation has a new spring will help with reliability and function.
Prop 65 Warning
WARNING This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov. (California law requires this warning to be given to customers in the State of California.)