Here in the states, check out Stone Mountain Miniatures - in the ACW range:
ACW250 Army Supply Depot: Crates, barrels, sacks, ammo chests, stacked rifles
ACW253 Battlefield Debris: Damaged wheels, artillery equipment, rifles, backpacks, sabers, drums
More the latter than the former, the stacked rifles is a single casting of multiple weapons, but multiple pieces of stacked rifles. Don't recall if the Battlefield Debris included pistols - but I recall seeing some out there at one time, individual pistols.