And on the note of what can be achieved with rifle grenades, I so wish there was at least one decent site out there that had credible info on the Olin Corp RAAM Rifleman's Anti-Armor Weapon, a munition weighing about 1&3/4 kg and was (judging by pictures) about a foot and a half long (including a few inches of stand-off probe), which claimed a performance of ">400mm" against armor, and a range of 250m (by the pictures, it's roughly the same diameter as the round handguards of the M16A1 & up); and also the Brunswick Corp RAW Rifleman's Assault Weapon, a roughly 4&3/4kg "toffee apple"-looking munition, containing a 140mm diameter warhead holding 1kg of plastic explosive, a small tube of propellant (was spin-stabilized), claiming a maximum range of 1500m and penetration of 200mm of concrete (with considerable blast debris & fragmentation, no doubt). Both of these (by the pictures in books I have) are shown being fitted & fired from US Army M16s (the RAAM was a rocket-boosted bullet trap rifle grenade, while the RAW had a rather clumsy-looking gas trap system that attached to the rifle's business end, bleeding muzzle gas into some kind of chamber to intiate the RAW's propellant, spin-up & launch), with both claiming to have recoil no worse than a 12 gauge shotgun (pictures are shown firing off the shoulder in kneeling positions), not something really difficult for most military-trained shooters. (these two munitions can both be seen in Greenhill Military Manuals' Infantry Support Weapons: Mortars, Missiles, and Machine Guns, pp 74-77, c1995, ISBN 1-85367-210-6, Ian V Hogg.)