.40/9mm - frame differences? - WaltherForums

Go Back   WaltherForums > Walther Firearms > P99

LinkBack Thread Tools Display Modes
Old 05-15-2019, 11:22 PM   #1
Senior Member
Join Date: Aug 2008
Location: Herndon, VA
Posts: 182
MattB .22
.40/9mm - frame differences?

I have a Gen1 P99 in .40S&W, and I’ve kicked around the idea of a 9mm conversion. From what I’ve read, conversion barrels are not always an ideal solution due to differences in the slide and extractor. However, if I were able to find a complete 9mm P99 Gen1 slide and barrel assembly, could I put it on my .40 frame with no issues? Not sure where I’d find a P99 upper, but I’m curious if it would work.
MattB is offline   Reply With Quote
Old 05-16-2019, 12:47 AM   #2
Senior Member
Join Date: Feb 2011
Posts: 6,706
balance .22
The ejector is part of the sear housing, which is installed in the frame. The 9mm and .40 ejectors are different.
balance is offline   Reply With Quote
Old 05-23-2019, 07:12 PM   #3
Junior Member
Join Date: May 2019
Posts: 8
cslater .22
Jarvis makes a 9mm conversion barrel for the .40sw P99.I have used the P99 9mm and it is a very accurate barrel.It should work -all you need to do is swap barrel and the magazine.I am not 100% confident that the 40 cal mag will feed the 9mm 100%
cslater is offline   Reply With Quote
Old 05-28-2019, 12:19 PM   #4
Join Date: May 2017
Posts: 48
Robbins290 .22
Been tempted with this also. Tho the P99 did not fit my hand that good. If they still had the full size for that price, i would have jumped on it.
Robbins290 is offline   Reply With Quote

Lower Navigation
Go Back   WaltherForums > Walther Firearms > P99

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.