McAllister has returned to Nene Park in a deal running until January when he will complete a permanent move.

The 27-year-old recently spent a month's loan at Rushden, scoring once in four games and forming a useful partnership with Simeon Jackson.

McAllister joined Grays from Woking in May but started just five league games for the Essex side.

Meanwhile, Oxford midfielder Michael Standing has moved to the New Rec on a reserve contract which could become a full-time arrangement in January.