doall hunter
I really do not think it is possible. The Speed Breech is physically much larger and a completely different design that a regular Omegas breech plug.
This page shows the regular Encore/Omega breech plug
https://secure.tcarms.com/store/muzz...acement-parts/
And this page shows the Speed Breech
https://secure.tcarms.com/store/muzz...-parts/page-3/