Item-GAC:Aluminum Handle Caulking Gun.
The most popular style GAC-75 / GAC-87
Item-GHC:Half casing Caulking Gun.
The most popular style GHC-51
Item-GOC:Opening Caulking Gun.
The most popular style GOC-30 / GOC-34
Item-GPC:Plastic Caulking Gun.
The most popular style GPC-13 / GPC-17