Fusilier Flint-Broughton had joined the Army in November 2011 and was on his first overseas deployment.
Lt Col Lindsay said Fusilier Flint was a soldier "brimming with skill and ability".
However, he added that the only people who killed Fusilier Gentle were the terrorists who planted the bomb.
BBC: NEWS | UK | Scotland | Soldier death charges considered
Fusilier Gentle was wearing appropriate body armour but this could not protect him from a close quarter explosion.
BBC: NEWS | UK | Scotland | Armour review after soldier death
Lt Col Robin Lindsay, commanding officer of Fusilier Flint, said he was a soldier "brimming with skill and ability".
BBC: Afghan bomb blast: Tributes to Blackpool Fusilier Flint
Fusilier Turrington, whose parents live in Haslingfield, left Comberton Village College in the summer 2001 and joined the Army.
Fusilier Flint, 21, was from Blackpool and Pte Hetherington, 25, was born in the US but grew up in Scotland.
Fusilier Flint, 21, and originally from Blackpool, joined the Army in November 2011 and was on his first overseas deployment.
The military funerals of Cpl Savage, 30, from Irvine, Ayrshire, and Fusilier Flint, 21, from Blackpool, Lancashire, are expected to take place next week.
Electronic counter measure equipment was fitted to the Land Rover Fusilier Gentle was travelling in and was working correctly but was ineffective against the device.
BBC: NEWS | UK | Scotland | Armour review after soldier death
Fusilier Kelan John Turrington, 18, who had been in the Army for less than two years, was killed on Sunday night as British forces made a final push into Basra.
Fusilier Flint, who was 21 and from Blackpool, was described by his family as "a loving son, the protective brother, courageous nephew, the caring uncle, the loyal grandson that anyone would wish to have".
Charlotte Wilkinson, a friend from Poulton-le-Fylde, said she saw Fusilier Flint, a Manchester City fan, shortly before he left for Afghanistan in March and all his friends were "devastated" at the news of his death.
BBC: Afghan bomb blast: Tributes to Blackpool Fusilier Flint
Cpl William Savage and Fusilier Samuel Flint, of the Royal Highland Fusiliers, the 2nd Battalion The Royal Regiment Of Scotland, and Pte Robert Hetherington, of the 51st Highland, 7th Battalion, a Territorial Army member, died after their armoured vehicle was hit by a roadside bomb.
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