1. Military Tactical Backpack Large Army 3 Day Assault Pack Molle Bug Out Bag Backpacks Rucksacks for Outdoor Hiking Camping Trekking Hunting Black (Click Link to Check Price on Amazon)
Editor's Rating : 9.3 out of 10
Military Tactical backpack size approx.:13"*20"*11" / 33*50.5*28CM (W*H*D),Capacity: 40L Military backpack is made of high density fabric--durable and waterproof

2. Military Tactical Assault Pack Backpack Army Molle Bug Out Bag Backpacks Small Rucksack for Outdoor Hiking Camping Trekking Hunting Black (Click Link to Check Price on Amazon)
Editor's Rating : 9.2 out of 10
Tactical assualt backpack Capacity: 34L. Size approx.:11"*18"*12" / 28*45.5*30CM (W*H*D), it's not big backpack Military backpack is made of high density fabric--durable and waterproof.

3. Eyourlife Military Tactical Backpack Small Rucksacks Hiking Bag Outdoor Trekking Camping Tactical Molle Pack Men Tactical Combat Travel Bag 20L Black (Click Link to Check Price on Amazon)
Editor's Rating : 9.5 out of 10
JUST THE RIGHT SIZE: Main Compartment:17.7"x9.4"x4.7", Secondary Compartment: 15.7"x7.8"x2.75", Upper Front Pocket: 4"x7"x2.3", Lower Front Pocket: 9.8"x7"x2.3". Small but sufficient enough tactical hiking bag, Capacity: 20 L. This size suits both women and men. If you need larger one, have a look at this B01AUFK3EM.PROFESSIONAL DESIGN: It has a roomy main storage area, dual FRONT POCKETS. MOLLE style ACCESSORY LOOPS on front. Padded and breathable mesh back panel and shoulder straps offer cushioning comfort, while also promoting air circulation along your back and shoulders, Almost the best simple & useful tactical backpack at this price.

4. Red Rock Outdoor Gear Assault Pack (Medium, Olive Drab) (Click Link to Check Price on Amazon)
Editor's Rating : 8.8 out of 10
Molle webbing throughout for attaching additional pouches or gearMesh ventilated padded back panel with Velcro top closure

5. "Big Monkey" Tactical Military Backpack with 3 Molle Bonus Bags - 2.5L Hydration Water Bladder Included - By Monkey Paks Pack (TAN) (Click Link to Check Price on Amazon)
Editor's Rating : 9.2 out of 10
SIP WITHOUT STOPPING * Hydration backpack water bladder lets you easily sip on the go with a removable 2.5L large mouth BPA free bladder.STOW GEAR FOR YOUR 3-DAY EXCURSION * US Army style backpack has a huge capacity plus a ton of MOLLE webbing for all your gear requirments.