How do I load JT21 staples into a Arrow JT27 Stapler gun?

SOURCE: How do I load staples

At the end of the stapler opposite where the staplers are driven out is a release.

Push it in and turn it and it should come out with a long spring

Load your staples, put the spring back and lock it.

SOURCE: Hi can't seem to reload stapler

All you do is open the end peice and slide the staples in on the two rails, point down. You should be able to see in the end to make sure nothing is blocking the rail with a flashlight. You probably have the wrong size staples. You can only use # 214, 215, 276.

SOURCE: I need instructions on how to refill the Arrow T50

remove the spring loaded magazine from bottom rear of unit by pushing down on piece about two inches below curve section of rear end of handle push down gently and pull to rear staples go in front ofin same slot from which this magazine is removed load normally two clips if your dead empty when you return the spring follower back into place it follows the staples if if doesnt go all the way in you probably have to many remove some good luckd

SOURCE: Staple Gun Troubleshooting

Most of the staple gun models lack an "anvil" — the metal plate with curved slots that office staplers use to bend the legs of the staple inwards and flattens them against the paper. Staples set with a staple gun retain their straight legs, and are held in place only by static friction of the legs against the compressed surrounding material, much like common nails. Indeed, some staple gun models can handle brads and nails as well as staples. Some staple guns also use divergent point staples where the legs twist as the staple drives into the surface providing superior holding power.

SOURCE: just got an ET50red electric

remove the staples and check inside for a jammed one up there. squirt some oil in there. load it again and try. please follow the instructions to a tee. having the wrong staples or what ever can damage the unit, if it isn't already. good luck