Winchester NATO-Spec Army Primers forty one are a similar primers Utilized in the Lake Town 5.56mm ammunition. These primers are built to exacting requirements for shot to shot regularity. All primers are consistently and rigorously analyzed for consistency and sensitivity at temperatures and ailments far outside of the selection of usual usage. Winchester guarantees thoroughly-managed weights of primer mixtures, regularity in dimension and excellent, specific measurements and tolerances winchester 41 primers for anvil heights and stability in extremes of temperatures and humidity.