The passive radiator has an aluminum sandwich dome in addition to a rigid multi-department chassis. The maximum excursion from the passive radiator is ± five.5mm. The general diameter in the passive radiator is 220 mm. The P220 also functions an automatic firing pin block safety which happens to be activated https://sig-sauer-p220-for-sale55556.shotblogs.com/the-best-side-of-sig-sauer-p220-elite-dark-for-sale-40941322