So some 68 specials are converted SMG's right? So could they run the SMG's F/A sear? I don't feel like I've ever seen that but I've never looked at a 68 special so not sure if something about the modification prevents it.
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You can do that but it turns into a chop machine. IIRC a little bit of modification was needed.
EDIT: For some reason I think it was RuleOfSines who got one working with a RotorLast edited by netsurferdude2; 07-09-2021, 04:12 PM. -
Yes, you can also mod a stock 68 Special trigger to work in FA, but you will need a Rotor/Halo to feed it and a device to block the squeegee port in the side of the breech to feed properly.
I did it, didn't care for it, removed the trigger mod.Comment
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It is also trivial to convert the 68-special sear to run full-auto.
Most blowbacks use a simple "slip sear". Basically, the sear is not fixed in place, but sits in a slot allowing it to slide slightly, so to reset itself.
All you need to do is remove the sear, and drop a small ball bearing, or a BB or whatever into that slot, reinstall and you will have full-auto. Nothing permanently modified.
Another option is to drill a slightly behind the sear, so you can a screw, or bolt, or whatever, to prevent it from slipping. This method gives you a selectable semi/full.
In the 90s, I think pretty much everyone does this mod at some point. As a newb, it seems super cool until you realize nothing is going to feed that fast.
The 68-special is a good candidate though. Most blowbacks (ie spyders etc) cycle around 40cps. Nothing is going to feed that fast, and its just easier to use an e-frame with eyes.
The special, however, is a little under 20cps. Its managable with high-speed forcefeeders. You will still get blends but its something to play around with if you already have them laying around.
edit: There was also an infamous contest back 20 years ago where there was a prize to come up with a way to make a full-auto stingray feed from a Revvie, with no electronics. Its alot harder then you might think you slow the hammer down. The Tippmann F/A used hydralics, and even that was a fussy system.
I tried making a lever delayed system, but did not slow down enough. The winner made a pneumatic curcuit. It was clever but a little too complicated
But..... its another option if you want a full/auto 'Special with no electronics:
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The one I've always wondered about is the VM. I've never measured it's full-auto rate, but once, years ago, when I was attempting a trigger job on one, all I succeeded in doing was making it go FA.
That was long before force-fed loaders, but it struck me at the time that it seemed- to my uncalibrated ear- almost slow enough to be workable. I've meant any number of times to dig out one, plunk a good Rotor or HALO on it and give it a try.
I can't recall precisely what I did to the trigger, but it was really little more than adding an overtravel screw. Tighten said screw too much, and the trigger would release, but not far enough for the disconnector to, er, disconnect. (Functionally, said travel stop might have shortened the total VM trigger travel by maybe half a mm. The VM mechanism basically needs every bit of it's factory travel in order to work properly.)
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How do real steel open blowback machine guns slow their bolts down? Like the WWII grease gun.......?'96 RF Mini Cocker, '95 RF Autococker, 68-Automag Classic, Banzai Splash Minimag, Gen-E Matrix, Shoebox Shocker 4x4, Montneel Z-1, Tippmann Pro-Carbine, Tippmann Mini-Lite, Tippmann Model-98, Tippmann 68-Special, Spyder .50 cal Opus/Opus-A , Tippmann .50 Cal Cronus , Gog Enmey .50 cal , Tippmann Vert ASA 68-Carbine, Bob Long Millennium, ICD Grey Green Marble Splash Alleycat Deluxe (runs liquid co2) , Halfblock 2K4 Prostock Autococker , 2K RF Sniper II
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Big heavy bolts. The big .50 Cal M2 Browning machine gun is blowback- bolt weighs something like 15 pounds.
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shes so sexy though
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Heavy bolts, like Doc said, and some used hydraulic sears. Many WW2 guns had a hydraulic shock attached to the sear to add a delay to the bolt movement.
A simplified system was used on the Tippmann F/A. There is some slow-motion footage on forgotten weapons. Its facinating
Plus adjustable gas ports, and recoil buffers can slow a littleComment
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doesnt the m16/m4 use a hydraulic filled buffer? would be cool to experiment with these full auto ideas. heavy bolts and hydraulic's, would be very time consumingComment
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