While they were mucking around with the innards of the rifle, the designers also took steps to improve the reliability of the platform. AR-10s can be prone to poor cycling. The pressures generated by the .308 can stress and break the extractors and ejectors. The GII has two plunger-style ejectors in the bolt face, which halves the stress on the springs and the extractor has an innovative design, using a polymer buffer in place of a mechanical spring. According to the guys at DPMS, this polymer unit showed no sign of wear or memory after a 30,000-round test.