STAGS manager Billy McEwan took his tally of summer signings to 15 when four players agreed terms on Friday afternoon.
Strikers Anthony Robinson and Aaron O'Connor, midfielder Tom Shaw and keeper Luke Herriott will all go into the squad for tomorrow's first League match of the season at Ebbsfleet.
They had been on trial at Field Mill for the past couple of weeks and join two other players - Alex Jeannin and long-term loanee Paddy Gamble - to have signed on the dotted line this week.
Nottingham-born former Grays striker O'Connor had limited Football League experience when he was released by Scunthorpe after three substitute appearances in 2003.
However, the pacy O'Connor (24) was a Gresley Rovers hot shot, struck 80 goals in 127 games with Rovers and won their Player of the Year twice in as many seasons.
O'Connor - 25 on the day of the Ebbsfleet match - has also had spells with Ilkeston Town, Scunthorpe United, Nuneaton Borough and latterly Blue Square Premier rivals Grays.
He first featured for the Stags in the 3-2 home defeat by Derby two weeks ago.
Tom Shaw (21), a midfielder, left Rushden in the summer after 50 games and has featured for the Stags since the beginning of pre-season.
Keeper Herriott (17) has been training at Field Mill this summer, while Robinson (27) has joined from Blue Square Premier rivals Kettering.