HK Army HPA Compressed Air Tank Regulator Top Bonnet (Dual O-Ring) (Standard & Aerolite) - Black (UB7)
HK Army HPA Compressed Air Tank Regulator Top Bonnet (Single O-Ring) (Standard & Aerolite) - Black
PBG Customs HK Army Compressed Air Tank Regulator Stainless Steel Bonnet (Standard & Aerolite) - Black
PBG Customs HK Army Compressed Air Tank Regulator Stainless Steel Bonnet (Standard & Aerolite)