Sandbags End 2
Sandbags are not very sturdy but can be put down quickly and provide decent protection from bullets.
Crafting
Craft at Backpack · makes 1
Crafted as 
Sandbags: pick this one of its variants when you place it.
Crushed Sand× 4
Cloth Fragment× 15
Harvest drops
Taken apart with a harvesting tool (axe, pickaxe, shovel), before perks and tool bonuses.
Where to find (56 POIs)
Area 7 (tier 5), Champions Coliseum (tier 5), Dishong Tower (tier 5), Higashi Pharmaceutical (tier 5), Hybrid Mining (tier 5), Navezgane Corrections (tier 5), Navezgane County Jail (tier 5), Ostrich Hotel (tier 5), Red Mesa Compound (tier 5), Shotgun Messiah Factory (tier 5), U.S. Army Post #7 (tier 5), Aranea Caverns (tier 4), Camp Hollow Point (tier 4), ChemTech Distribution Center (tier 4), Close Encounters Gun Range (tier 4), Don Vittorio Spagetto Residence (tier 4), Downtown Marketplace (tier 4), Favales Academy (tier 4), Fort Bags (tier 4), Fort Camo (tier 4), Fort Choppa (tier 4), Fort Quonset (tier 4), Goldrush Station (tier 4), Installation Blue Ridge (tier 4), Navezgane High School (tier 4), NDC Checkpoint Three (tier 4), Richard Munchz Plaza (tier 4), Shotgun Messiah Range (tier 4), Stand Tower (tier 4), The Zavislak Residence (tier 4), Fire Station 8 (tier 3), Fort Razor (tier 3), Fortified Farm (tier 3), Forward Supply Depot (tier 3), Journey's End (tier 3), Pop-N-Pills (tier 3), Ranger Station Golf (tier 3), The Hyde Residence (tier 3), The Serrano Residence (tier 3), Weston Weigh Station (tier 3) and 16 more.
Points of interest built with this block (any of its variants), the highest tiers first, from the game's prefab files.