Retro Arms CNC Hop Up Chamber AK receiver sets the shape of the drilling

the shape of the drilling is adjusted in the area where the Hop Up rubber sits

4UAD Bucking and Nub $15

Extremely Crisp Semi Response

checking the GPS

The Hopup Chamber M4A unit is wisely equipped with an interchangeable Inlet Adapter

Retro Arms CNC Hop Up Chamber AK receiver sets the shape of the drillingThis is the newest Hop Chanber for AK from Retro Arms They changed their drill depth allowing the use of 20. 1 mm nozzles This Precision Hop Chamber will increase accuracy and consistency for your AK AEG platform Included 1pcs Hop Up chamber for AK (anodized, made from aircraft dural EN AW 7075) 1pcs Setting lever (anodized, made from aircraft dural EN AW 7075) 1pcs Pushing lever with cut for common spacers(anodized, made from aircraft dural EN AW