Winchester NATO-Spec Armed forces Primers 41 are the identical primers Utilized in the Lake Town 5.56mm ammunition. These primers are developed to exacting technical specs for shot to shot regularity. All primers are continuously and rigorously examined for consistency and sensitivity at temperatures and disorders far past the choice of ordinary usage. Winchester guarantees very carefully-controlled weights of primer winchester 41 primers mixtures, consistency in dimensions and excellent, specific measurements and tolerances for anvil heights and steadiness in extremes of temperatures and humidity.