I'm looking to build my first AR and just want to make sure the parts I'm looking to get will work. I figured I would just buy a completed upper assembly and piece together the lower. Here are the parts I came up with (minus optics). The main concern I have is using the Bushmaster LPK with the Spikes stripped lower. Would it be better to go with a Spikes LPK? Aside from that, would all of these parts work together?
Upper Assembly
http://www.stagarms.com/product_info.php?cPath=14_24&products_id=244
Lower Receiver
http://www.aimsurplus.com/product.aspx?item=F1STSL&name=Spike's+Tactical+AR15+Lower+Receiver&groupid=53
Lower Receiver Parts
http://www.aimsurplus.com/product.aspx?item=XBMLPK&name=Bushmaster+AR15+Lower+Parts+kit&groupid=53
Complete Buffer Kit
http://www.aimsurplus.com/product.aspx?item=XDSABK&name=DSA+Complete+Buffer+Tube+kit&groupid=143
Stock
http://www.aimsurplus.com/product.aspx?item=XMAG310Blk&name=Magpul+CTR+Carbine+Stock+M-Mil+Black&groupid=147