Schemes -
http://www.streetpro.com/usp/images/usp_dtal.jpg
http://www.streetpro.com/usp/images/usp-cut.jpg

Exploded diagram and parts list -
9mm and .40S&W: http://www.gunsourcebyzcl.com/home/Gun- ... al-diagram
45ACP: http://www.gunsourcebyzcl.com/home/Gun- ... cp-diagram

Parts -
http://www.hkparts.net/shop/pc/HK-Pistol-Parts-c15.htm
http://www.midwayusa.com/find?sortby=1& ... geNumber=2
http://i1259.photobucket.com/albums/ii5 ... IMG023.jpg
http://50ae.net/collection/usp45/

Barrel -
http://sgcusa.com/handguns/h-k/barrels/ ... tical.html

Manuals -
http://stevespages.com/pdf/hk_usp_field ... manual.pdf
http://stevespages.com/pdf/hk_usp_armor ... ctions.pdf
http://stevespages.com/pdf/hk_usp-series.pdf

Disassembly instructions -
http://hk.mattvanderhoff.com/pdf/hkusp.pdf

Disassembly videos -
http://www.youtube.com/watch?v=uUhbyLZoMYY
http://www.youtube.com/watch?v=dLRCPwlv0So
http://www.youtube.com/watch?v=cpHAw4XrO6M
http://www.youtube.com/watch?v=9KEyHtCa8nY
http://www.youtube.com/watch?v=FVWzmLSNcSY
http://www.youtube.com/watch?v=uTAaI-lxuj0
http://www.youtube.com/watch?v=KxxbzlQULgw
http://www.youtube.com/watch?v=IXEvLJDALNI