I decided to get the actual factory HK SP5K. It has been about 20 yrs since I shot an MP5 but I always wanted one, so this is the closest thing I figured! It shoots amazing and is very accurate. But, I found out the hard way they are ammo sensitive. I assumed it would cycle anything. So, I brought a box of 50 Men. ammo and 300 rds of cheap Rem. UMC. It shot the Men. perfect and grouped less than an inch at 25 yds. But it would not cycle the Rem at all. I mean double feeds every other other rd. But after doing some reading I found that the HK's need full power ammo apparently. I was a little pissed because I also brought my CZ Scorpion and it cycles anything! Do not get me wrong the HK is heads above the CZ but kind of ironic.
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