So I've seen a number of posts here and there talking about the accuracy going down the drain when installing a suppressor on the MPX. well I picked up an MPX K last year, mainly because I wanted something really small and the HK SP5 K was ridiculously over priced at the time. I also wanted to get a suppressor for it. It wasn't till after I bought it and started looking for a can that I started reading about the potential accuracy issues and that it could be pretty gassy. Not only that, but I was struggling to get decent groups with my regular ammo in its factory configuration even without adding a suppressor. On average I was getting 4-5" patterns at 10-15 yards. At 20 yards it was 7-9". I did find some ammo that worked a bit better, but I couldn't do much better than 2-3" at 10 yards and that was with a red dot. By comparison, my full size HK SP5 was shooting groups much smaller at twice the distance with irons and a much heavier trigger.
I was a bit disappointed, and came to the conclusion that I would probably just have to spend another $500 and buy a ILWT barrel if I wanted this to work. About that time though, my Wolfman was released from jail and I've just been having a blast with it on the SP5, and the MPX K has been sitting in the safe for the past 6 months.
This morning though, I was messing around with some stuff getting ready to go to the range and I realized that I had a LH piston and fixed barrel spacer for an Obsidian that would fit the MPX barrel. I went out to the shop and took off the factory flash hider, which didn't appear to have any rocksett on it and was only torqued to about 15-20 lbs. I put the Obsidian in its K configuration on there and headed out to the range. I set the target out at a bit past 15 yards and proceeded to shoot a ragged one hole group with it. What the heck? I tried several types of ammo with it and all had the same results. 10 yards was 1" offhand, unsupported.
So I'm a bit confused I guess. I'm still very new to the suppressor world, and most of mine are still in jail. I have heard of a suppressor potentially slightly increasing the accuracy in something like a rifle, but taking a PCC that shoots patterns like a shotgun, to actually grouping like it's supposed to is a new one for me.
Has anyone else experienced this? One thing I forgot to try when I was there today was to shoot it with no can or F/H. I'll have to try that next time. Is it possible that the F/H was the culprit the whole time?
