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Single shot airsoft

This area is for the discussion of BB or airsoft sub machine guns, and or other small arms such as pellets.
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Re: Single shot airsoft

Unread postAuthor: hectmarr » Sat Jul 29, 2017 9:47 pm

Ok, it's fine. It is better to make the videos when everything is well finished. Thanks and regards !
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Re: Single shot airsoft

Unread postAuthor: farcticox1 » Sun Jul 30, 2017 6:07 pm

So I got it finished quite quickly today, 2 barrel sleeves and spacers made and painted. Turned out looking better than I ever thought it could. Barrel extension is removable with 2 bolts, stock with 1 bolt.

finished.jpg


finished bolt.jpg


Fully assembled weight is 3.25Kg (7.2Lbs) length is 1015mm (40") Barrel is 6mm ID/10mm OD seamless stainless, total length 600mm (from breach) 23.5".
short barrel is 280mm (11") the extension is 320mm (12.5")
The lower body is the chamber, 1" PVC. The main valve is a 3/8" QEV off Ebay, trigger is a 1/8" 3/2 limit switch.

20170505_194112.jpg

1.jpg


All the aluminum parts are made from scrap pieces I collected, all hand fabricated, probably 40 to 60 hours to put it together , I never keep track really cause I make parts as I go along for more than one project at a time :shock:

Onto the next project, I have 2 I'm working on, maybe another one after that :idea: , and I do still have that piece of 1/2" seamless tubing :idea: :idea: :idea:
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Re: Single shot airsoft

Unread postAuthor: jackssmirkingrevenge » Mon Jul 31, 2017 9:13 am

Another great project, nicely done!
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Re: Single shot airsoft

Unread postAuthor: farcticox1 » Tue Aug 01, 2017 2:49 pm

Just gonna make a couple of extra parts for it, trigger guard and a barrel cover when the extension is not on, like a birdcage flash hider

birdcage.jpg
birdcage.jpg (13.39 KiB) Viewed 441 times


Did a rough chrono check with the Android app, 0.2g BBs = 300fps with long barrel, 280fps with short. :o


Will try and get some heavier BBs, maybe 0.4s, especially as my next project has a much longer barrel.
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Re: Single shot airsoft

Unread postAuthor: jackssmirkingrevenge » Tue Aug 01, 2017 6:37 pm

Did a rough chrono check with the Android app, 0.2g BBs = 300fps with long barrel


That's... not too impressive if accurate to be honest. With a QEV and I'm guessing 100-150 psi you should be going upwards of 500 fps easily with 0.2g BBs. I think you need a proper chrony, they can be had for less than 100 dollars ;) Supersonic BBs are within reach if you ever decide to go to higher pressures.
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Re: Single shot airsoft

Unread postAuthor: farcticox1 » Tue Aug 01, 2017 6:46 pm

yes, on my wish list, or my 'to build' list :idea:
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Re: Single shot airsoft

Unread postAuthor: farcticox1 » Wed Aug 02, 2017 4:32 pm

The finishing touches, flash hider under construction

20170802_163511.jpg


The finished project in short barrel

20170802_175930.jpg


20170802_175902.jpg


Now for the video
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Re: Single shot airsoft

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Re: Single shot airsoft

Unread postAuthor: Xamllew » Thu Aug 03, 2017 12:26 am

Nice work on the flash hider, looks very clean overall. I like how the stock is built off of the chamber. Looking forward to the video.
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Re: Single shot airsoft

Unread postAuthor: farcticox1 » Thu Aug 03, 2017 7:06 am

So here is the video, it is 4 joined together, not great quality.

This is how the barrel attaches

video (2).jpg


video (3).jpg




Still bugged by poor accuracy, I think the barrel material is actually too tight, it is 6mm ID but not precision tube, if you drop a BB in the barrel it will not freely drop through, my older BB attempts use 7mm ID tube with 1/4' (6.4mm) ball bearings and they are very accurate at close distance, so I might try polishing out the barrel especially the extension, I think the little bumps are acting like multiple hop ups so the BB can go in any direction. :idea:
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Re: Single shot airsoft

Unread postAuthor: farcticox1 » Thu Aug 03, 2017 4:07 pm

Polishing made a huge difference, started with a round file down the bore and sliding it back and forwards for a couple of minutes, then some fine abrasive cloth on a rod until the BB would fall through. I have a piece of M6 silver steel rod which is pretty much 6.00mm OD, will cut a piece of this and use as a gauge and keep polishing until it goes all the way through both barrels.
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Re: Single shot airsoft

Unread postAuthor: farcticox1 » Thu Aug 03, 2017 7:09 pm

farcticox1 wrote:just did a very quick test as I plan on using some 7mm ID tube to shoot 6mm airsoft as I need the barrel curved.
With a straight 18" barrel, 7mm ID tube, at 10 feet, fired 4 shots, 2 went through the same hole, 1 was 1/4" off, 1 was 1/2" off.
Good enough for me.


Well that's interesting, apparently I did that 2 years ago :shock:
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Re: Single shot airsoft

Unread postAuthor: hectmarr » Fri Aug 04, 2017 4:21 pm

Cute, cute and very cute this I see. :bounce: :bounce: :bounce:
Clean work and every shot you make save your own construction. Nothing cuter than that. I congratulate him. regards
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