Hornady 5.56 TAP SBR is designed specifically for 10.5-inch to 11.5-inch short-barreled rifles. Designed to meet the requirements of the FBI protocol, TAP SBR is made to deliver exceptional performance in suppressed or unsuppressed SBRs. It produces virtually no flash or residue, dramatically reduces sound signature, will not foul or overheat suppressors, and provides controllable rate of fire in automatic platforms, according to the company.