P7 Dirt

[Buthid]

how nasty should a P7's gas piston look?
i got a pic...just cant fig. how to upload.

[cmdrdredd]

to upload a pic go to www.imageshack.us and select the size you want it. Then browse to your picture and click upload. When it's done you will get a screen with some text boxes with the URL you should use to post it on a forum.

[Dango]

mine gets BLACK and caked with carbon. Just scrape it off.

[Sobriquet]

Spray it with some Mpro-7 (or better yet, rub some of their bore gel on it), let it sit for 10 minutes, and then scrub it with a nylon toothbrush. Effective and gentle.

[Buthid]

test #1 http://img140.imageshack.us/img140/5168/0913081453pj3.th.jpg (http://img140.imageshack.us/my.php?image=0913081453pj3.jpg)

[Sobriquet]

Mine looks like that after shooting (athough not all the way down the piston). Just clean it like I mentioned above.

[Buthid]

thanks...i also noticed that if i use Hopes #9 solv. too ruff it takes some blue of my NDS P7. i use hopes for everything and that is the only gun that does that. is it because its been through hell?

[H&K 4 LIFE]

Whats more important is if the gas rings on the piston are sharp. Your piston looks to be in great shape, and quite clean actually. :P

DO NOT brush it with a metal brush as this can dull the rings, use an old toothbrush.

[Mark71]

Whats more important is if the gas rings on the piston are sharp. Your piston looks to be in great shape, and quite clean actually. :P

DO NOT brush it with a metal brush as this can dull the rings, use an old toothbrush.

+1.
Use a soft toothbrush or a rag to clean/wipe the piston down.

[raydoctor]

Dude...that looks better than mine after I clean it! You can get alot more grunge in there than that and it will still run. I've run 1500-2000 of WWB through mine while only reaming the cylinder every 400-500 rounds. Don't get too torqued up about some carbon on the piston. I soak mine in that SLIP2000 milky voodoo juice stuff and comes off very easily.

[Sobriquet]

I'm surprised you can rack the slide with that many rounds between scraping it. My slide gets really stiff around 200 rounds.

[Buthid]

thanks guys its been a real help.
http://img54.imageshack.us/img54/3900/0913081409gc5.th.jpg (http://img54.imageshack.us/my.php?image=0913081409gc5.jpg)