12gram piercing valve?

Andrewliu6294 · 06-22-2008, 01:56 PM

I just got some brass.

Actually it was given to me by a friend, with a long term payment plan...still on the edge about actually doing that.

Anyway, I've been fiddling around with it. It has a backbottle system, which I don't like, but the front cap also as the rod-thing that pushes the 12g into place. Theres a piercing seal inside also. Just no pierce pin.

Strange right? Thats not the least of it. It looks like an LB, but the lower tube says P-series, and it appears to have had a stock feed at one point. Now theres a RF neck.

I think its a non-cartridge valve, as there is a dot of solder where the grub screw/air passage would normally be.

Is there any way to change out the valve to one with a piercing assembly? I would need an RVA as well.

Skippy · 06-22-2008, 02:47 PM

All you need to do to get it to pierce 12grams is replace the valve stem with a pierce pin one. PPS has them.

Note that you'll need to seal off the backbottle system somehow though.

Might have started as a P68sc, can't say for certain unless you post pictures.

Andrewliu6294 · 06-22-2008, 04:14 PM

This is assuming that I would need to remove the valve to do so?

then I would need a sheridan valve tool.

Maybe I should just send it into palmers for a P-tune, and have them install the valve pin and RVA.

Ironduke · 06-25-2008, 01:01 AM

Don't forget that Sheridans are not instapierce and need a priming shot to open up the 12g.

russc · 06-25-2008, 07:56 PM

Almost sounds like it could be a hacked pursuit pistol. PMI-IIs didn't have the cartridge adapter.

06-22-2008, 01:56 PM	#1 (permalink)
Andrewliu6294 Active Member Join Date: Aug 2007 Posts: 348	12gram piercing valve? I just got some brass. Actually it was given to me by a friend, with a long term payment plan...still on the edge about actually doing that. Anyway, I've been fiddling around with it. It has a backbottle system, which I don't like, but the front cap also as the rod-thing that pushes the 12g into place. Theres a piercing seal inside also. Just no pierce pin. Strange right? Thats not the least of it. It looks like an LB, but the lower tube says P-series, and it appears to have had a stock feed at one point. Now theres a RF neck. I think its a non-cartridge valve, as there is a dot of solder where the grub screw/air passage would normally be. Is there any way to change out the valve to one with a piercing assembly? I would need an RVA as well.

06-22-2008, 02:47 PM	#2 (permalink)
Skippy KP: Kills Paycheques Join Date: Nov 2007 Location: Toronto, ON Posts: 363	All you need to do to get it to pierce 12grams is replace the valve stem with a pierce pin one. PPS has them. Note that you'll need to seal off the backbottle system somehow though. Might have started as a P68sc, can't say for certain unless you post pictures. __________________ My Feedback

06-25-2008, 07:56 PM	#5 (permalink)
russc MCB Member Join Date: Apr 2006 Location: Vancouver, BC Posts: 4,293	Almost sounds like it could be a hacked pursuit pistol. PMI-IIs didn't have the cartridge adapter. __________________ YouTube Channel / Raincouver! / Gallery / Feedback / Blackleaf Outfitters -Russ

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06-22-2008, 04:14 PM	#3 (permalink)
Andrewliu6294 Active Member Join Date: Aug 2007 Posts: 348	This is assuming that I would need to remove the valve to do so? then I would need a sheridan valve tool. Maybe I should just send it into palmers for a P-tune, and have them install the valve pin and RVA.

06-25-2008, 01:01 AM	#4 (permalink)
Ironduke Newbie Join Date: Oct 2006 Posts: 17	Don't forget that Sheridans are not instapierce and need a priming shot to open up the 12g.