http://www.airsoftmegastore.com/1548...0390338tm.aspx
The red tip might be screwed in, or just pressed on, 'seen them both ways. Either way, they will detatch and leave the gun looking very realistic. WE also makes grip panels of a better-looking brown plastic.
http://www.airsplat.com/Items/GP-WE-LUGER-P08.htm
http://www.shortyusa.com/airsoft.htm...&searchstring=
http://www.airsoftgi.com/product_inf...oducts_id=3151
http://www.airsoftmegastore.com/4554...IUM-Model.aspx
http://www.evike.com/product_info.php?products_id=3682
These are some sources for the WE popguns. There may be an airsoft gun dealer store in your area, that might have them on hand. Prob. less $ to buy them online.