Bayonet Band Stamp Markings

[Rogue5]

My M1 Carbine's Bayonet band has a "MMQ" stamp mark on the Left side of the band and "EMQ" on the bottom of the bayonet lug

Does anyone know what the Markings represent?
Are these Post-WW2 markings?

[Rogue5]

Photos of the markings

[MRusan]

On many other parts, EM-Q usually means it was made by Quality Hardware, but I don't have my reference book handy. The Type III barrel band with bayonet lug started to be available in late WWII (I want to say 1944-ish, but I might be off on that). Most were added during arsenal refurbs during the post WWII time period.

[Rogue5]

I'd like to have bayonet for this one day.

[MRusan]

I'd like to have bayonet for this one day.

https://www.midwayusa.com/product/1019930521/

[Rogue5]

I read MMQ (Muller Manufacturing) was a Subcontractor to Quality Hardware.