Findings:

• MK
• Cool MK (user)
• @mk@ (user)
• m+k (user)
• +++++++m-k+++++++ (user)
• mk- (user)
• mks (user)
• MKS
• Action Replay Mk VI
• Hawker Typhoon
• Mk 50 Torpedo
• Mk 46 Torpedo
• Enfield, Massachusetts
• Roland R-8 mk II
• Korg Poly-800 mk II
• Korg Trident mk II
• Lincoln Continental MK IV
• mk (user)
• Pattern 1853 Enfield
• Lee Enfield
• Harry Enfield
• Royal Enfield
• Enfield

If you Log in you could create a "Enfield Mk. 2" node. If you don't already have an account, you can register here.