Ancient manuscripts of New Testament
Oldest surviving copies/fragments of New Testament texts
Gospel of Matthew:
Chester Beatty paparys P45 - fragment (dated 200-250 A.D.)
Codex Vaticanus: 4th century manuscript (codex) of the Old and New testament. This bible was brought to the Vatican from Constantinope as a gift to the pope in the 14th century. Old Testament missing Gen 1-46:28, part of 2-Kings, Psalms 105-137. New Testament missing Hebrews 9:14, I and II Timothy, Titus and Revelation.
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Codex Sinaiticus: mid 4th century manuscript (codex) (British Museum) 
Gospel of Mark:
Qumran cave 7 (7q5 is Mark 6:52-53) - (dated around 50 A.D. !) - this may be possibly be the new earliest surviving New Testament manuscript: click here 
Codex Vaticanus: 4th century manuscript
Codex Sinaiticus: mid 4th century manuscript (codex) (British Museum)
Gospel of Luke:
Codex Vaticanus: 4th century manuscript
Codex Sinaiticus: mid 4th century manuscript (codex) (British Museum)
Gospel of John:
Rylands papyrus: (dated around 125 A.D. - currently considered to be the earliest surviving piece of New Testament text. Contains John 18:31-33 and John 18:37-38) 
Brodmer papyrus: (dated around 200 A.D.)
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Codex Vaticanus: 4th century manuscript
Codex Sinaiticus: mid 4th century manuscript (codex) (British Museum) .