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Posted: 1/31/2011 10:06:44 AM EDT
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http://www.aimsurplus.com/product.aspx?item=XRGLPK&name=Stainless+Steel+Lower+Parts+Kit+for+AR+Receivers&groupid=53
Anyone have any experience with these? Any advantage over any other standard LPK's? I was also considering a Palmetto LPK. |
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Quoted:
curious....i wonder if there is any potential for galling w/ stainless on stainless where the trigger nose meets the hammer notch? I asked the same question as the OP before I did my SBR build. The answers I got...correct or not...made me decide against stainless. |
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Galling is caused by heat and/or friction. Stainless steel is notorious for galling worse then any other metal. It can be slowed if not prevented by the use of lubricants (CLP Break Free was specifically designed for steel to aluminum contact i.e. the bolt carrier and upper), coating the stainless steel with somthing like hard chrome (or aluminum with anodizing), or using a special kind of stainless steel that helps prevent galling.
It occurs quickest when two disimilar materials are in direct contact and move relative to one another. For example screwing a stainless steel bolt into a block of aluminum. It will almost immediately bind because the natural barrier the stainless steel has, oxide, is "rubbed" off (its actually more then rubbing off but we dont need to get into that). As you can see all these factors leed me to personally feel that using stainless steel parts in direct contact with an alumnium lower isn't the best idea. |
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