Pink m4 has been auctioned for at least 5 years, its always had the description as being a regular m4. The only problem iv found is that i had to buy normal m4 in order to use the m4 upgrade with pink. Anyways m4 is an m4 its standard and buffing it would be kinda ridiculous especially considering m4 is already op for its price.

Perhaps some gani buff would be more sufficient