How does this work?

chasep255 · July 23, 2011, 10:23 PM

http://www.youtube.com/watch?v=mFJTw1Xl-UI&NR=1

I don't understand what causes the shotgun to pump itself?

g.willikers · July 24, 2011, 02:46 PM

It's not magic.
Lots of pumps will open the action if the action lock, at the back of the trigger guard, is pressed up when the trigger is pulled, from the force of the recoil.
The guy shooting in this video is then shoving the action forward, overhand, right after he drops a new round through the ejection port.
Mighty quick, ain't he?

zippy13 · July 24, 2011, 03:00 PM

Trick gun handling doesn't make a pump an auto-loader any more than bump firing makes a semi a full auto.

jaguarxk120 · July 24, 2011, 03:53 PM

Just another way to waste ammunition.

jmr40 · July 24, 2011, 08:17 PM

Most any pump will do that. Maybe not when new and the parts have not been broken in. Nothing special in that video.

TheKlawMan · July 24, 2011, 08:26 PM

If that is what the guy is doing, shooting with the action lock released, can that damage the gun. I would think that many parts of the action and trigger assembly may not be designed for the force that blowback may generate.

I am reminded of the 1960 Westerns and the guy that fans his six shooter. It looks impressive, but was it that accurate to anyone but a particularly skilled trick shooter?

LastRebel70 · July 24, 2011, 08:33 PM

My Mossberg will do this when firing 3" magnums.

chasep255 · July 24, 2011, 08:37 PM

I wonder what would happen if you then put a strong rubber band holding the pump forward so that it would close itself too.

Cheapshooter · July 24, 2011, 08:59 PM

Not how, but why? Looks like a completely useless drill. Is it supposed to impress somebody?

Dfariswheel · July 25, 2011, 06:21 PM

He's NOT "pressing the action lock then pulling the trigger".

The gun appears to be a Remington 870 and like all modern shotguns the action lock disengages the trigger mechanism when it's pressed.
You CANNOT "press the lock and pull the trigger to fire".

What is happening is the shooter is firing heavy buckshot loads.
Many shotguns will open the action themselves if the hand guard isn't held forward. The Winchester Model 1300 actually had a spring "assist" action to help this along.
Many good shotgunners can fire a pump gun will almost semi-auto speed by taking advantage of the actions tendency to partially or fully open itself, especially with heavy recoiling shells.

Doing a search on the gun forums will turn up a good number of posts asking what's wrong with their shotgun, because the action is opening on it's own.

Jo6pak · July 25, 2011, 07:33 PM

Quote:

Originally Posted by Cheapshooter

Not how, but why? Looks like a completely useless drill. Is it supposed to impress somebody?

I don't think he's trying to impress anyone. Just soldiers having a little fun, and blowing off steam.

g.willikers · July 27, 2011, 11:22 AM

Dagnabbit, Dfariswheel,
You make me go dig out my old Mossberg to see if the trigger works, when the action lock is pushed.
And it does.
Must be different than the 870.
Where it's located, it's kind of hard not to push the action lock upward, with finger number two, when gripping the stock.
And the trigger does, indeed, still drops the hammer.
I tried it many times, with the hand on the stock grip as normal, and by doing it kind of remotely, hand off the stock.
Dang, I should have made a bet first.
Never think of these things fast enough.

Slopemeno · July 27, 2011, 02:35 PM

Our shotgun class covered getting your now empty 870 firing again, and the first move was to toss a live round in the ejection port, just like you see there.

TheKlawMan · July 28, 2011, 12:16 PM

Pulling the trigger on my 870 Express will not drop the hammer if the action lock is pushed.

July 23, 2011, 10:23 PM	#1
chasep255 Senior Member Join Date: December 21, 2009 Location: NJ Posts: 727	How does this work? http://www.youtube.com/watch?v=mFJTw1Xl-UI&NR=1 I don't understand what causes the shotgun to pump itself?

July 24, 2011, 02:46 PM	#2
g.willikers Senior Member Join Date: September 28, 2008 Posts: 10,442	It's not magic. Lots of pumps will open the action if the action lock, at the back of the trigger guard, is pressed up when the trigger is pulled, from the force of the recoil. The guy shooting in this video is then shoving the action forward, overhand, right after he drops a new round through the ejection port. Mighty quick, ain't he? __________________ Walt Kelly, alias Pogo, sez: “Don't take life so serious, son, it ain't nohow permanent.”

July 24, 2011, 08:59 PM	#9
Cheapshooter Senior Member Join Date: December 2, 2007 Location: Missouri Posts: 8,306	Not how, but why? Looks like a completely useless drill. Is it supposed to impress somebody? __________________ Cheapshooter's rules of gun ownership #1: NEVER SELL OR TRADE ANYTHING!

July 27, 2011, 11:22 AM	#12
g.willikers Senior Member Join Date: September 28, 2008 Posts: 10,442	Dagnabbit, Dfariswheel, You make me go dig out my old Mossberg to see if the trigger works, when the action lock is pushed. And it does. Must be different than the 870. Where it's located, it's kind of hard not to push the action lock upward, with finger number two, when gripping the stock. And the trigger does, indeed, still drops the hammer. I tried it many times, with the hand on the stock grip as normal, and by doing it kind of remotely, hand off the stock. Dang, I should have made a bet first. Never think of these things fast enough. __________________ Walt Kelly, alias Pogo, sez: “Don't take life so serious, son, it ain't nohow permanent.”

July 24, 2011, 03:00 PM	#3
zippy13 Senior Member Join Date: August 23, 2008 Location: SoCal Posts: 6,442	Trick gun handling doesn't make a pump an auto-loader any more than bump firing makes a semi a full auto.

July 24, 2011, 03:53 PM	#4
jaguarxk120 Senior Member Join Date: February 28, 2008 Location: Michigan Posts: 2,620	Just another way to waste ammunition.

July 24, 2011, 08:17 PM	#5
jmr40 Senior Member Join Date: June 15, 2008 Location: Georgia Posts: 10,808	Most any pump will do that. Maybe not when new and the parts have not been broken in. Nothing special in that video.

July 24, 2011, 08:26 PM	#6
TheKlawMan Junior member Join Date: June 23, 2009 Location: Orange County, CA Posts: 2,149	If that is what the guy is doing, shooting with the action lock released, can that damage the gun. I would think that many parts of the action and trigger assembly may not be designed for the force that blowback may generate. I am reminded of the 1960 Westerns and the guy that fans his six shooter. It looks impressive, but was it that accurate to anyone but a particularly skilled trick shooter?

July 24, 2011, 08:33 PM	#7
LastRebel70 Member Join Date: March 15, 2009 Location: tennessee Posts: 20	My Mossberg will do this when firing 3" magnums.

July 24, 2011, 08:37 PM	#8
chasep255 Senior Member Join Date: December 21, 2009 Location: NJ Posts: 727	I wonder what would happen if you then put a strong rubber band holding the pump forward so that it would close itself too.

July 25, 2011, 06:21 PM	#10
Dfariswheel Senior Member Join Date: May 4, 2001 Posts: 7,478	He's NOT "pressing the action lock then pulling the trigger". The gun appears to be a Remington 870 and like all modern shotguns the action lock disengages the trigger mechanism when it's pressed. You CANNOT "press the lock and pull the trigger to fire". What is happening is the shooter is firing heavy buckshot loads. Many shotguns will open the action themselves if the hand guard isn't held forward. The Winchester Model 1300 actually had a spring "assist" action to help this along. Many good shotgunners can fire a pump gun will almost semi-auto speed by taking advantage of the actions tendency to partially or fully open itself, especially with heavy recoiling shells. Doing a search on the gun forums will turn up a good number of posts asking what's wrong with their shotgun, because the action is opening on it's own.

July 27, 2011, 02:35 PM	#13
Slopemeno Senior Member Join Date: January 19, 2007 Posts: 2,663	Our shotgun class covered getting your now empty 870 firing again, and the first move was to toss a live round in the ejection port, just like you see there.

July 28, 2011, 12:16 PM	#14
TheKlawMan Junior member Join Date: June 23, 2009 Location: Orange County, CA Posts: 2,149	Pulling the trigger on my 870 Express will not drop the hammer if the action lock is pushed.