Quote Originally Posted by 120mm View Post
I say again, the ONLY "cover" that PDW rounds can perforate reliably is CRISAT. And none of our current or foreseeable enemies is stupid enough to wear body armor to the battlefield. PDW rounds against "real" cover are worse than useless. Light, fast bullets just don't penetrate very well.

One more point on PDWs and "itty-bitty bullets" IOT save weight. I guaran-freaking-tee you, that a lightweight "bullet-hose" PDW will go through ammo fast enough, that will more than neutralize the alleged "weight-savings" versus a "real" rifle.
...and these would be reasons not to adopt a PDW, but as no one has really done the testing versus tactical applications, I would want to see some evidence. The MP-7A1 and P-90s are both being used on operations by various folks, but hard data is very hard to come by.