HomeBuilt AirGun — This Weeks Progress
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9MM home built air gun. 17 inch 357 magnum barrel.
Been donig a little bit every evening.
This gun is unfinished – no polishing or anything yet. There is still machinist’s dye on parts (makes them look dirty in the pictures),
The barrel and all internals are installed.
If you look close, I used a spring plunger (mounted in the handle ) to provide trigger return pressure. You can adjust the trigger pull pressure by changing out spring plungers. The front trigger pull is about 5 pounds and the rear (fireing trigger) is about 2 pounds.
Test fired it today and got 60 foot pounds energy, with .350 , 65 grain, lead balls. Disapointed – expected 120 at least, but that was with no twicking or tune up and only 120 Bar pressure. Blows a BIG hole through a 2 by 4 , even at this power level. Has quite a recoil. VERY loud! – no end cap installed yet.
I have yet to build the top rail.
You can see the rosewood grips I have roughed out. I will mount them like on a 1911 45 pistol. I would like to checker the grips.
Has anyone done checkering?? I see a checkering toolset costs about $75.
Can anyone do checkering?? How hard is it?
Mark
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Viewing 13 replies - 1 through 13 (of 13 total)
Now that is a punching bag….lol
Nice work! Checkering is not hard, especially a straight pattern like on .45 grips. Good tools are a pleasure to use, do a better job, and last a lifetime. Be sure and practice some on scrap. Instructions will probably come with the tools.
Small world–so are mine.
It certainly doesn’t affect your engineering and machining skills!
VERY nice work!
Tron wants to see. 😆
Small world–so are mine.
It certainly doesn’t affect your engineering and machining skills!
VERY nice work!
😯 Talk about minimalist!!!!!! 😯
Wow MM, awesome job…
I think you even scared my Chrony!!! 😆
Can’t wait to see how you dress it up and finish it out, keep up the great work and post more goodies to drool over!!
JW
what another one lol this forum,s starting to realy heat up . i think we should set up a wee comp between the lads who have built there guns (just for fun) 😀
WOW…THAT’s really starting to come around nice. 😀
Thanks for the update.
Maybe your chrono is just plan scared of it. Looks like it is banging that lead really good.
This was a 158 grain 357 magnum bullet (soft lead , not hard cast) fired through my Homebuilt Airgun.
The crono read 470 feet per second???? About 75 foot pounds energy.
I think my crono is messed up??? I am getting substantal recoil, and a lot of noise, and a huge mushroom, — all indications of more power than 75 FPE ????
The bullet mushroomed to .65 inch from .356 when it hit a thick catalog
That is looking great. I love the double triggers. Looks like it is turning into a real hammer!
My balls are deformed.
.350 lead balls, shot at 60 FPE, from 17 inch barrel.
The pen points to a ball that hit a knot in the 2 by 4 and split it in half.
Mark
Viewing 13 replies - 1 through 13 (of 13 total)
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mark wrote :You can see the rosewood grips I have roughed out. I will mount them like on a 1911 45 pistol. I would like to checker the grips.
Has anyone done checkering?? I see a checkering toolset costs about $75.
Can anyone do checkering?? How hard is it?
Mark
well mate i,ve never done it myself but my mate,s done a few and said it,s not to hard to do with a small dremil bit .. have u ever thought about stippleing them instead i,ve got a good link that shows u how to do it .if u want it let me know mate 😀