PDI HOP-UP Chamber for Classic Army / PDI M24

PDI HOP-UP Chamber for Classic Army / PDI M24 CNC Aluminum made Hop up Chamber Allows you to use more adjustments on your BB's spin Also allows you to use various lengths of AEG type barrels for a wider range of tuning options This One-Piece Chamber Set is more durable and accurate in feeding BB Suitable for Classic Army / PDI M24 Series Airsoft Sniper Rifle