Originally Posted by
Peter Laidler
Must have had an extractor change surely! I have just used a .303 BB assembly in an L4 gun (not the same I agree....) with a slightly dinged/distorted drill round (to replicate it having been fired and tight in the chamber) and the 7.62 drill round just moves to the rear a couple of mm's, then upwards slightly and slips off the extractor. It's not exactly comparing like with like but the mechanics of it are the same.
"The trouble with a converted gun WITHOUT the magazine well stop inserts is that before long the gun feed lips will tear away. Or maybe this only occurs with those guns that use L1A1/FN type magazines that sit slightly deeper in order for the BB feed horns to make better contact with the smaller base rim diameter of the 7.62 cartridge