S&W 78G Piercing Pin

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DwightP980

DwightP980

Member
Feb 7, 2017
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Florida, United States
Hoping someone might give me a little help locating a piercing pin #11219, or the cap assembly #11266 for a S&W 78G (.22), or a 79G (.177) 
This CO2 air pistol was manufactured by S&W around 1977 and I believe the same assembly may of been used in the Daisy Powerline 780 and 790.
Or, if someone has a work around for this part, and you could share your idea, it would be greatly appreciated!

 
@Dwightp980
Wow! That's impressive. I picked one up at he NC Airgun show last year and all of the seals were dust. I handed it off to Sue Smith and she got it in fine working order. I'm also a big fan of Crosman Mark 1 and 11s from the same era. Crosman engineers designed S&Ws and that's why they work similar to the Mark 1,11 but probably not telling you anything that you don't already know. Good luck on your search.
 
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@Kev
I bought a brand new Mark II .177 in 1973 and that was my first CO2 air pistol. That too was a great pistol, which I traded with me adding $75 cash to a neighbor for a Harrington Richardson Model 999 Sportsman .22, 9 shoot with the vent rib top, which I later sold just before shipping out to go overseas. I wish I had both of them now! I'd like for a company like Umarex to produce a S&W Model 41 design like the 78G or 780. I bet it would sell!
 
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I've got a S&W 78G converted to .20/5mm with a LW barrel. They are somewhat delicate if gorilla fisted on re-assembly.
If you're interested I could post a build thread entailing easily avoided pitfalls, as well as a few easy accuracy mods that will benefit even a stock gun.

FYI the Crosman barrels from that era (built in two separate S&W facilities) ranged from stellar to "ho-hum" in the accuracy department, but I agree with you, that air-pistol as a whole is a tribute to American ingenuity at its finest !!
 
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@Ziabeam
I would love to see a build thread on the 78G! I've always been happy with the accuracy of the copy of 78G I bought, however in the hands of a skilled competition pistol shooter their opinion may be completely different. I had thought about re-barreling many years ago while doing a reseal job, but it was only a passing thought, and I wondered if the gain for cost, and effort would be worth the increase in accuracy which I may not be able to realize from my primarily freehand/standing position. 
I'm definitely interested in the build thread, and accuracy modifications! 

 
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@Kev
I currently have my 78G torn down, and awaiting a couple parts from JG Airguns. I've have never really considered my trigger that bad on my 78G and other than a good cleaning on tear down and a very light application of copper anti-seize between the trigger, and hammer assembly, I have left it in an original condition. With the lack of available parts for the 78G (still looking for a source for the piercing pin assembly #11219) I'll most likely continue to live with the way way mine shoots, as I'm pretty happy with it. 
Sorry to not be much help.

Regards!
 
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"DwightP980" (still looking for a source for the piercing pin assembly #11219)

Regards!

"Kev" Meant to address DwightP980 and Ziabeam about trigger creep question.


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@DwightP980
They may be cross compatible. Edit... (listing description states they are);
http://www.ebay.com/itm/crosman-mk1-mk2-original-piercing-cap-/201798002181?hash=item2efc192605:g:wfgAAOSwImRYjLhU

@Kev
Some of them had a set screw on the underside of the trigger to reduce creep, along with two position hammer for fast or slow velocity.
Those with no set screw are relegated to stoning/grinding for improved trigger, which is sketchy at best due to shallow depth of surface hardness.
Might be best to only polish the mating surfaces with a felt wheel and rouge by Dremel.

 
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The piercing pin assembly for the Crosman Mark 1/2 will work in the S&W 78G/79G.

I was just given a S&W 79G that the seals are toast in the piercing assembly. Used the assembly from my Mark 1 to be able to shoot it. Fired gun 35 to 40 times. Gun had set for a long time gathering dust without being shot, so I ordered a seal kit and will reseal the whole gun when I get the kit. When I received the gun, it still had one of the old CO2 cartridges in it with the crimped on top hat. Thats why I know it had not been shot for probably several years.

Ziabeam, still would like to see your build instructions.
 
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