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Do you have to have a threaded barrel on your 5.7 to use a dead air mask or is this adapter all you will need? — 1 Answer

by BossMan, from TX, United States Asked on October 20, 2020

Name Dead Air Armament Thread Adapter FN 5.7 1/2x28 TPI DA422
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Answered by J, guest, from FL, United States, on September 17, 2021

You need to have a threaded barrel on your 5.7. The thread pitch on the 5.7 is 10X1mm RH, due to the diameter of the smaller round. This adapter converts the 10X1mm to the more common 1/2X28 thread pitch

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