Stupid question. Is there any such thing as a DAO shotgun or rifle?
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El Tejon
Member
You mean besides the Mossberg, 590DA, and a couple of others?
Cosmoline
Member
Yeah, that's a good point. The "double action" shotguns are really just single action long guns with an extra heavy trigger pull, aren't they?
Justin
Moderator Emeritus
I recall reading that the Spectre submachinegun had a double action trigger pull.
Jim Watson
Member
There was a 4-barrelled Lancaster that used their ring trigger DA; about 130 years ago.
John Browning's First Rifle Design Double-Action?
Somebody may have to correct some details in my recollections, but I believe St. JMB's first design for a rifle for his brother involved a simple trigger as follows (forgive the hasty sketch in advance, please):
The drawing on the left shows the one-piece trigger/hammer combination in its cocked position. The arrow represents the force of a spring against the trigger/hammer. The dot with the "S" is a stop on the trigger's movement forward.
The force of the spring, being below the axis or hinge ("H"") of the trigger/hammer, tends to rotate the trigger /hammer clockwise against the stop.
As the trigger is pulled and rotates counter-clockwise as shown in the right-hand drawing, the force of the spring at one point is suddenly above the axis ("H") and suddenly rotates the whole trigger/hammer counterclockwise, firing the cartridge. Kind of gets "overbalanced" at that point.
I don't know. Would that be a "double-action" rifle?
Somebody may have to correct some details in my recollections, but I believe St. JMB's first design for a rifle for his brother involved a simple trigger as follows (forgive the hasty sketch in advance, please):
The drawing on the left shows the one-piece trigger/hammer combination in its cocked position. The arrow represents the force of a spring against the trigger/hammer. The dot with the "S" is a stop on the trigger's movement forward.
The force of the spring, being below the axis or hinge ("H"") of the trigger/hammer, tends to rotate the trigger /hammer clockwise against the stop.
As the trigger is pulled and rotates counter-clockwise as shown in the right-hand drawing, the force of the spring at one point is suddenly above the axis ("H") and suddenly rotates the whole trigger/hammer counterclockwise, firing the cartridge. Kind of gets "overbalanced" at that point.
I don't know. Would that be a "double-action" rifle?
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RecoilRob
Member
The Striker/Street Sweeper shotguns had the trigger cock and release the hammer. And, the pull was pretty heavy and long.
The Semi-Spectre is DA/SA. DA on the first pull if you have released the striker.
The Semi-Spectre is DA/SA. DA on the first pull if you have released the striker.
HammerBite
Member
230rn . . .
That is interesting! You start the trigger squeeze and the trigger finishes it for you. Only two parts for fire control: the hammer/trigger and the spring.
Do you have any details about the configuration of the rest of the rifle?
That is interesting! You start the trigger squeeze and the trigger finishes it for you. Only two parts for fire control: the hammer/trigger and the spring.
Do you have any details about the configuration of the rest of the rifle?
HammerBite asked:
No, sorry, except I recall that it was a .22 single shot, and no illustrations provided, only a verbal description of the trigger/hammer action, and noting the fact that he designed and built it for his brother in his father's shop, so he was pretty young.
I think I may have read it in one of the bio sketches at the Browning Museum in Utah back in 1967 or so.
It was of course touted as an example of his design genius, of which, nowadays, there is little doubt.
(I took a picture of his first toolroom model of the 1911 in that museum which I can't find.)
Sorry.
No, sorry, except I recall that it was a .22 single shot, and no illustrations provided, only a verbal description of the trigger/hammer action, and noting the fact that he designed and built it for his brother in his father's shop, so he was pretty young.
I think I may have read it in one of the bio sketches at the Browning Museum in Utah back in 1967 or so.
It was of course touted as an example of his design genius, of which, nowadays, there is little doubt.
(I took a picture of his first toolroom model of the 1911 in that museum which I can't find.)
Sorry.
bogie
Member
Why would someone WANT a double action only rifle?
If you want "trigger safety," what you want is a good two-stage trigger... It may start at 5 pounds, then it "goes up" two more to seven, but breaks clean.
If you want "trigger safety," what you want is a good two-stage trigger... It may start at 5 pounds, then it "goes up" two more to seven, but breaks clean.
There was the Canada Scout, which was a .22 LR/WMR (some models were convertible) revolver carbine. It had a rifle length barrel and a stock. The action resembled an S&W double action revolver. Never seen one in person, just in old ads- DA/SA IIRC.
bogie
Member
Betcha $5 that someone from one of the major gun companies is paid to read the tacticool interwoob forums, and shows up at his morning meeting tomorrow saying "Guys, you have GOT to produce a tactical double-action only assault rifle!"
Wild Deuce
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The Mossberg 590DA is not a true double action. When you pump the gun it chambers the round and partially cocks. Pulling the trigger finishes the cocking action and releases. If you pull the trigger a second time, nothing happens. I should know ... I have one.
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