It uses an aluminum skeleton that operates the length from the chassis from forearm to buttstock. It is possible to modify the attract strain (that’s the power on the barrel) to tune the rifle. This feature seriously sets it other than other fall-in chassis. Specialist font designs, measurements, and colours: https://m14alcs08528.ageeksblog.com/28862795/detailed-notes-on-sage-ebr-chassis-for-sale