HKParts Compensator Damage my HK P2000

[Snoopy47]

Whatever the issue, these compensators are a workaround for CA law. Gun Manufactures are not designing rails to deal with the effects of a compensator. They are designed to hold a light and it just sit there, not have the blast from the gasses torque through the rail by way of the attachment.

Figure out a welded compensator solution to a proper threaded barrel. Your compensator results will also be in line with how they are meant to operate.

[82A1CAL]

No bullet strike on compensator. The plastic rail slot on the P2000 is just too close to the tip. HKParts been making HK Compensator for a while. Never seen anyone complain so I decided to give them a try. I knew there was always a risk adding aftermarket parts. Lesson learned! The gun shot ok with that chip so I drilled another slot to mount a light with laser combo. I still kept one compensator on my other P2000 in 9mm but I won't be shooting it with compensator mounted.

If not bullet strike inside the compensator, then probably internal defect inside the plastic but not necessarily a "defect" of the frame, as the front light clip is never designed to handle any force in the direction it failed. There is not a lot of material at the area it failed. Aftermarket gadget like this is cool, but problem like this can happen.

I had similar experience putting a mock compensator on a Glock attached to the rail like your system, however except just pressure hold, it also has a screw that attached it via the rail slot. I even ream out the compensator to make sure a free wide, open bullet path. After all it is just for the looks. Welp, after a range trip less than a mag full, the compensator flew off the rail. The gas pressure alone was enough to smear the rail slot and jettison the compensator. There is just not enough strength in the plastic slot to hold against the gas pressure.

[82A1CAL]

Ouchie! Do you still have the piece that broke off?

No, I didn't even bother to look for it when it came off.

[Sandspider500]

That rail mounted "compensator" probably has a large hole at the muzzle end, letting quite a bit of gas out the front, but, with 6-7gr of pistol powder, there isn't much gas anyway, at least not enough to be any kind significant addition to recoil.

Barrel mounted compensators, or brakes, add weight to the barrel, and in a short recoil operated pistol like a 9mm or 40s&w, the weight is going to reduce felt recoil more than the tiny amount of gas. The felt recoil is from the slide speed. Any weight added to the assembly will slow the slide speed=reduced felt recoil. The muzzle flip will happen when the slide impacts the frame, and by that time in the ballistic event, the bullet and gas are long gone.

6gr of pistol powder is a little over 3% of the 180gr bullet weight, meaning, it's not contributing much to recoil.

Think about how a rocket works. The rocket combusts a fuel(kinda like gunpowder) and a oxidizer, the more mass of fuel and the faster in shoots of out, the more the rocket is propelled forward. The rocket is working off of recoil.