Brass breeches are the ultimate in springer performance, creating an almost perfect airtight seal between plunger and dart. These stencils makes the "tongue" side easy.
Stencils are provided for 9/16" and 17/32" OD brass tubing.
Simply slide the appropriate stencil over your brass, scribe or trace the outline, remove, and cut. The tongue is graduated every 1/4" so you can match your breech to your dart.
You can also cut the breech directly around the stencil, without tracing it. Be warned, it's likely to melt!
This model is licensed CC-BY-NC-SA.