Adams Arms Drop-in Piston Conversion Kits for AR Pistol (PDW) with 4" Free Float Quad Rail

Adams Arms Drop-in Piston Conversion Kits for AR Pistol (PDW) with 4" Free Float Quad Rail Review

Adams Arms Drop-in Piston Conversion Kits for AR Pistol (PDW) with 4" Free Float Quad Rail Feature

• Contains our one piece bolt carrier and a 4" 4 railed forend.

The Adams Arms Gas Piston System is an end user installed after-market product for Mil-Spec ARs. It will fit on any AR barrel with a .750" or 3/4" diameter at the shoulder where the front sight base sits. The Pistol version will work on barrel lengths from 7.5" to 8.5" that has an exsisting pistol gas system.