Originally Posted by
The Armourer
I've picked up a couple of 303 chamber inserts.
British S.M.L.E Enfield Caliber Convertion Sleeve rifled. Caliber 4 X 6 mm Flobert (1920) or 4 mm ZENTRALFEUER RWS. Made by Tauler - Master (Madrid) circa 1940
Can use Flobert 4mm 'short' or 4mm 'long'.