HK ARMY SLR/KLR Pure Lens piston head but this adapter will work

but this adapter will work for any regulator

Highly anticipated

Semi-auto pistol that uses USW

6-position retractable and foldable stock with comfortable rubber buttpad and adjustable cheek riser

HK ARMY SLR/KLR Pure Lens piston head but this adapter will workThe KLR SLR PURE Lens System is composed of virgin optical grade GE polycarbonate inherently UVA \ UVB and IR shielded, every KLR SLR lens shields your eyes from dangerous sunlight in every playing condition. The Pure interior thermal lens features 3M Foam Sealant, trapping a layer of cool barrier of insulating air, eliminating condensation and encouraging evaporative cooling. Features Lens fits SLR and KLR goggle systems Dual layer anti fog thermal