Resq47
07-10-08, 02:40
http://farm3.static.flickr.com/2287/2188380991_ce47749c90.jpg
I've got an AR45 greasegun mag lower with an upper using a RRA slickside flat-top receiver modified to use the Olympic wire ejector and built up with a 16" Oly barrel in .45ACP. I've got ~500 rounds through the upper with the last 300 shot this last week trying to figure out what it's doing wrong. The typical failure I'm seeing is either a failure to eject with a live round mostly chambered and the spent case aft of the live round or what I've been calling a bolt override with the case fouling the charging handle and a live round in some degree of being stripped off the mag. Typically clearance is difficult with the charging handle caught by the spent case requiring manual retraction of the bolt and manual removal of the case from wherever it has wedged itself. I've also had stovepipes in the mix, just for fun apparently.
This is an assembly from all new parts, and having written it all out I'd guess it's a bad extractor but I honestly can't even remember what the extractor setup is on this bolt. The ejector is an unfamiliar setup to me as well, and has given me plenty of headaches in assembly/teardown with the microscopic cross pin.
I really want this thing to work, but it's not even reliable enough for a match at the moment. Anybody have any experience getting Oly pattern pistol cal uppers like this to work well?
I've got an AR45 greasegun mag lower with an upper using a RRA slickside flat-top receiver modified to use the Olympic wire ejector and built up with a 16" Oly barrel in .45ACP. I've got ~500 rounds through the upper with the last 300 shot this last week trying to figure out what it's doing wrong. The typical failure I'm seeing is either a failure to eject with a live round mostly chambered and the spent case aft of the live round or what I've been calling a bolt override with the case fouling the charging handle and a live round in some degree of being stripped off the mag. Typically clearance is difficult with the charging handle caught by the spent case requiring manual retraction of the bolt and manual removal of the case from wherever it has wedged itself. I've also had stovepipes in the mix, just for fun apparently.
This is an assembly from all new parts, and having written it all out I'd guess it's a bad extractor but I honestly can't even remember what the extractor setup is on this bolt. The ejector is an unfamiliar setup to me as well, and has given me plenty of headaches in assembly/teardown with the microscopic cross pin.
I really want this thing to work, but it's not even reliable enough for a match at the moment. Anybody have any experience getting Oly pattern pistol cal uppers like this to work well?