Since 1988 OPS INC has been one of the primary suppliers of suppressors to the U.S. Military. Our M16/M4 suppressor units have been in use, without failure, in Panama, Desert Storm, Somalia, Haiti and by an undetermined number of government entities and test facilities. During this current conflict the OPS INC SPR/MBS has been the primary silencer chosen by U.S. Special Forces Groups. As in the past, we guarantee our devices for 30,000 rounds or 2 years, which ever comes first. On the HK21 7.62mm belt fed machine gun, 1400 rounds were fired in a total of 15 minutes. The baffles did not become deformed under this extreme temperature. Our products are strictly evaluated before they leave the shop, which is why we have yet to experience a manufacturer failure in over 20 years. It is our hope and highest priority that our products help save lives.