Canadian CADPAT Recon Rucksack augmented with surplus pouches on each side.
It has an internal frame, and I've been using it for about 3 years now.
The little stag knife is a 1950's era Robert Klaas and the other is 13 1/2 inch Golok.
The pack cost me $38CDN three years ago. The new updated ones run about $70CDN now.