tag:blogger.com,1999:blog-3274583756441452923.post3795816090161004567..comments2024-02-13T14:28:21.282-05:00Comments on New Jovian Thunderbolt: Funny looking partNew Jovian Thunderbolthttp://www.blogger.com/profile/09452246769246304612noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-3274583756441452923.post-42423162313700416492015-06-22T19:40:36.867-04:002015-06-22T19:40:36.867-04:00I had an Argentine 1911-ish pistol that had a main...I had an Argentine 1911-ish pistol that had a mainspring housing much like that, IIRC. <br /><br />B https://www.blogger.com/profile/10586046436233366155noreply@blogger.comtag:blogger.com,1999:blog-3274583756441452923.post-65594070482098091132015-06-22T14:03:50.231-04:002015-06-22T14:03:50.231-04:00I believe Auto-Ordnance used to inflict that on th...I believe Auto-Ordnance used to inflict that on their mainspring housings. No one really knows why. However, some pistolsmiths have taken to drilling a small vent hole on the inside face of the mainspring housing to prevent a buildup of oil, grease, or any other fluid inside the housing from interfering with the compression of the mainspring and its cap.Anonymoushttps://www.blogger.com/profile/08271697105934618782noreply@blogger.com