5+6 Detent plate needed to convert USP full size and compact pistols to variants 5 and 6 DAO with safety. Also used to convert USP full size and compact to variant 9 and 10 DA/SA safety only. 

Fits:

• USP9
• USP40
• USP45
• USP9 Compact
• USP40 Compact
• USP45 Compact