This bullet is a spin off of our short range training round which uses a standard 5.56 case with a plastic bullet which accurately immitates the trajectory of M855 but has reduced range and risk of collateral damage. The IDF experiemented with using it as an anti personel round, primarily aboard ships as to reduce the possibility of riccochet. While its certainly safer to use, it lacks suitible terminal ballistics and thus is no longer being used. With the advances in frangible and HP ammo, using this ammo really isn't necessary which is why its being surplused off. The lethality of this ammo is comperable to a really powerful airsoft gun. These are certainly lethal, however they are inferior to standard ball ammo or other alternatives. Don't think its safe to shoot your friend in the ass with these....its not. They will kill, just not as good as TAP. They will function fine in your weapon and are a good solution if you have limited space. They should work great for your situation.