The iconic M63 Picatinny Handguard is a tri-rail system from Surefire launched around 2005 and made obsolete around 2015. It was one of the first aftermarket picatinny rails available for the MP5 and HK53 platform.
We've managed to track one down, it's in a good but used condition, with minor scuffs here and there. Perfect example for your clone or period correct build.
