P7 Piston Scraping and Cleaning Tool

[AF-Cop]

I have looked forwards and backwards at the P7 manual and do not see a reference for proper use of this tool. Can any one out there shed some light on this?

[Brownie]

Shtick it in the gas cylinder and twist. Then use the brush to clean the cylinder. About every 500 rounds seems about right for me.

[AF-Cop]

This tool is specifically for the piston... http://www.hkparts.net/shop/pc/Pisto...7-209p2057.htm

[EricE303]

This tool is specifically for the piston... http://www.hkparts.net/shop/pc/Pisto...7-209p2057.htm

Is this the HK Piston scraper tool? I have been looking for while and can not seem to find one. The picture on the sight is completely wrong.

Eric

[Big Moby]

You can get one here: http://cgi.ebay.com/ws/eBayISAPI.dll...#ht_500wt_1156

[ripley16]

Is this the HK Piston scraper tool? I have been looking for while and can not seem to find one. The picture on the sight is completely wrong.

Eric

Here's a photo of the three P7 tools, striker removal key, the brush and the scraper.

[TRMN8R]

Guys,

He is NOT talking about the gas cylinder scraper.

He's referencing a tool that most actually aren't familiar with that's designed specifically for scraping carbon deposits directly off the piston itself.

And, no; there's nothing in the Operator's Manual that shows exactly how that's accomplished, although it should be pretty straight-forward. Hold the slide in your left hand; push the piston up and away from the slide with your left hand thumb or index finger (whichever's easier); place the scraper down over the piston with the "T" handle end up; then just twist and run it down.

[ripley16]

Well there you go... I learned something today.

[mondovino]

The piston cleaning technique that I've read that makes the most sense to me is to avoid any metal to metal scraping at all. Simply soak the piston in a good carbon solvent and then brush it with a nylon brush. Any stubborn carbon between the rings could be chipped with a metal pick but is not really necessary to remove. All metal to metal contact with the sharp edges of the rings on the piston should be completely avoided.

[H&K 4 LIFE]

This is the first time I am seeing this type of tool.

The piston cleaning technique that I've read that makes the most sense to me is to avoid any metal to metal scraping at all. Simply soak the piston in a good carbon solvent and then brush it with a nylon brush. Any stubborn carbon between the rings could be chipped with a metal pick but is not really necessary to remove. All metal to metal contact with the sharp edges of the rings on the piston should be completely avoided.

I agree with you. However, if this is a HK factory tool, then it probably reams the gas piston in such a manner as to not dull the edges of the piston rings.

Even still I would not use this tool to clean the piston over zealously (i.e. using it for gerneral cleaning after a range trip). It is probably best reserved for use only on heavily fouled pistons.