Breech block not closing

mrerick · 05-11-2012, 08:58 PM

Olle, The fit of the toggle train in the receiver is generally quite close, but smooth. The tolerances were low and they were hand fit at the factory.

As mentioned in an earlier post, it is possible that someone inadvertently "adjusted" the receiver tighter by clamping it in a vise. It's worth a look at the barrel to receiver witness mark (on the bottom) to see if it lines up perfectly and if it's ever been disturbed by someone re-mounting the barrel.

The toggle train movement should be very smooth, and not feel like there is resistance as it completes going into battery. If it closes smoothly without a cartridge in the chamber, but encounters resistance with one in the chamber (even a fired case) then look more to the extractor as it climbs over the cartridge edge.

The use of lapping compound to polish the fit is a question for the more experienced Luger gunsmiths...

Marc

05-11-2012, 08:58 PM	#10
mrerick Super Moderator - Patron LugerForum Life Patron Join Date: Dec 2009 Location: Eastern North Carolina, USA Posts: 3,920 Thanks: 1,377 Thanked 3,135 Times in 1,518 Posts	Olle, The fit of the toggle train in the receiver is generally quite close, but smooth. The tolerances were low and they were hand fit at the factory. As mentioned in an earlier post, it is possible that someone inadvertently "adjusted" the receiver tighter by clamping it in a vise. It's worth a look at the barrel to receiver witness mark (on the bottom) to see if it lines up perfectly and if it's ever been disturbed by someone re-mounting the barrel. The toggle train movement should be very smooth, and not feel like there is resistance as it completes going into battery. If it closes smoothly without a cartridge in the chamber, but encounters resistance with one in the chamber (even a fired case) then look more to the extractor as it climbs over the cartridge edge. The use of lapping compound to polish the fit is a question for the more experienced Luger gunsmiths... Marc __________________ Igitur si vis pacem, para bellum - - Therefore if you want peace, prepare for war.