andremajic
05-05-2012, 10:02 PM
Hey guys,
Background info: During our back and forth emails with an o-ring seller on ebay, I suggested that she market some smaller packets as kits, so that people wouldn't have to buy a 5 packs of 100 o-rings each in order to finish a project which only required a couple of each.
Somehow the subject of o-rings in guns came up and she asked me to test fit a couple to an AR-15 extractor spring. It's the -005 size that fits perfect. Here's a link to the o-rings that fit:
http://www.ebay.com/itm/AS568-005-O-Rings-3-32-x-7-32-50-Buna-N-90-Duro-/200724101542?pt=Pneumatic_Hydraulic_Valves_Parts&hash=item2ebc16b9a6
The buna-N is a good gasket material which resists oils and solvents, so it would last quite a while before needing replacement. Here's a link of the specs and another company that specializes in o-rings: http://www.marcorubber.com/material_chart.htm
LOL. I just found out what midwayusa is selling ONE of these for: http://www.midwayusa.com/product/322189/pri-extractor-o-ring-ar-15-223-remington-68mm-remington-spc
$3.99 apiece!
Hope this helps someone!
Andy.
Background info: During our back and forth emails with an o-ring seller on ebay, I suggested that she market some smaller packets as kits, so that people wouldn't have to buy a 5 packs of 100 o-rings each in order to finish a project which only required a couple of each.
Somehow the subject of o-rings in guns came up and she asked me to test fit a couple to an AR-15 extractor spring. It's the -005 size that fits perfect. Here's a link to the o-rings that fit:
http://www.ebay.com/itm/AS568-005-O-Rings-3-32-x-7-32-50-Buna-N-90-Duro-/200724101542?pt=Pneumatic_Hydraulic_Valves_Parts&hash=item2ebc16b9a6
The buna-N is a good gasket material which resists oils and solvents, so it would last quite a while before needing replacement. Here's a link of the specs and another company that specializes in o-rings: http://www.marcorubber.com/material_chart.htm
LOL. I just found out what midwayusa is selling ONE of these for: http://www.midwayusa.com/product/322189/pri-extractor-o-ring-ar-15-223-remington-68mm-remington-spc
$3.99 apiece!
Hope this helps someone!
Andy.