No, Stormtroopers  from Star Wars not pass from the laser guns to the M4. And that the models they carry remind us very much to Sten, to the MG42, to... Look: 

Star Wars Blasters In REAL LIFE | Rebel Alliance

Star Wars Blasters in REAL LIFE | Galactic Empire

In this case it is only a M4 painted with camouflage pattern for snowy environments of Kryptek: the yeti. 

Kryptek is a brand that has developed a range of six different camouflages that suit different environments with great skill. It is a company created by soldiers who apply their experience to design the best patterns.

Here are several examples of painted models with the white pattern of his repertoire we leave: the yeti.