Bump On the Rear of the Frame??

Luke · 07-05-2001, 08:28 PM

On page 39 of Still's Third Reich book he states that the "Rear frame bump" was "reintroduced in about mid-1937." I checked backwards and forwards and it appears the bump was first introduced in the K series, dropped for the G series and the 1936 S/42, then reintoduced in mid-1937. I did not find it on any of the Lugers in his Imperial Lugers book.

Can anyone tell me why this bump was added in the 30s? Did it serve some critical function?

Thanks. Luke

Johnny Peppers · 07-05-2001, 09:47 PM

If I remember correctly, the flange on the axle pin was reduced in diameter and there was a problem with the smaller flange letting the pin move enough during recoil that only a very small part of the flange was supported during recoil and it tended to crack the edge of the flange. The hump on the frame extended far enough back to support a larger area of the flange.

The hump shows up on a few K Date and G Date Lugers, tends to go away in 1936 and then returns in 1937. It is very strange that it only appeared sporadically until 1937.

07-05-2001, 08:28 PM	#1
Luke User Join Date: Jun 2002 Location: NC - USA Posts: 1,239 Thanks: 0 Thanked 19 Times in 7 Posts	Bump On the Rear of the Frame?? On page 39 of Still's Third Reich book he states that the "Rear frame bump" was "reintroduced in about mid-1937." I checked backwards and forwards and it appears the bump was first introduced in the K series, dropped for the G series and the 1936 S/42, then reintoduced in mid-1937. I did not find it on any of the Lugers in his Imperial Lugers book. Can anyone tell me why this bump was added in the 30s? Did it serve some critical function? Thanks. Luke

07-05-2001, 09:47 PM	#2
Johnny Peppers User Join Date: Jun 2002 Location: Calion, Arkansas Posts: 1,042 Thanks: 0 Thanked 1 Time in 1 Post	Re: Bump On the Rear of the Frame?? If I remember correctly, the flange on the axle pin was reduced in diameter and there was a problem with the smaller flange letting the pin move enough during recoil that only a very small part of the flange was supported during recoil and it tended to crack the edge of the flange. The hump on the frame extended far enough back to support a larger area of the flange. The hump shows up on a few K Date and G Date Lugers, tends to go away in 1936 and then returns in 1937. It is very strange that it only appeared sporadically until 1937.