What size allen wrench to remove striker plunger?

[db3shabo]

Does anyone know what size allen wrench is needed to remove the silver pear shaped cover that allows removal of the striker plunger on an optic ready M&P 2.0? It's really small and I don't have the correct sized tool. Thanks in advance for any help offered.

 

[Mike-AK]

It is tiny. If I recall correctly it is 3/64”.

 

[Mike-AK]

Yep. Polished one this afternoon. 3/64"