What can you tell me about this upper?

rhuff · 10-09-2013, 04:47 PM

I am sorry, but I have to respectfully disagree with Alanint. In my "convertible" Alphabet Luger, I installed a new std. 9mm recoil/main spring, and with my 30 Luger ammo loaded to factory spec, it will function the same as the 9mm ammo. I also have a less stiff main/recoil spring, but I opted to try and error on the safe side.....and I believe that I was successful. If one were loading either or both rounds "soft", then you would most likely need to start changing some springs around.

10-09-2013, 04:47 PM	#9
rhuff Patron LugerForum Patron Join Date: Mar 2011 Location: Az. Posts: 2,314 Thanks: 2,746 Thanked 998 Times in 733 Posts	I am sorry, but I have to respectfully disagree with Alanint. In my "convertible" Alphabet Luger, I installed a new std. 9mm recoil/main spring, and with my 30 Luger ammo loaded to factory spec, it will function the same as the 9mm ammo. I also have a less stiff main/recoil spring, but I opted to try and error on the safe side.....and I believe that I was successful. If one were loading either or both rounds "soft", then you would most likely need to start changing some springs around.