If you ever wanted to build a trench shotgun like the ones which were used during World War this article wil be useful for you.

One of the readers researched if it is allowed to build a slam fire shotgun. Be sure to check this with your local authorities.

cv0lv0g0 posted photo and information about his slam fire 870 shotgun on Remington 870 Forum:

Slam Fire Remington 870
Slam Fire Remington 870

From cv0lv0g0:

I also have a trigger group which makes it “slam-fire”.

I have to get my mill up and running and I’m doing the same thing again but group that is in my 870 Which has stronger springs and a better trigger.

And for the nanny sayers:

Slam Fire Remington 870
Slam Fire Remington 870

I contacted ATF’s Firearms Technology Branch to get an answer to your question per our telephone discussion this morning. Please see the response below. Should you need any additional information or assistance, please do not hesitate to contact this office or your local WV office at 304-340-7820.

Sincerely,

Patricia Slaughter
Area Supervisor
Department of Justice
Bureau of Alcohol, Tobacco, Firearms and Explosives
Louisville Field Division/Louisville II (IO) Field Office
502-753-3500

From: Galbraith, Adam
Sent: Thursday, August 18, 2011 4:29 PM
To: Slaughter, Patricia A.
Subject: RE: Slam Fire/Pump Action Question

Hi Patty,

It is OK from a GCA/NFA standpoint, but he may want to consider liability/product safety before doing that.

Adam Galbraith
Firearms Technology Branch

*******
NOTICE: This e-mail message and any attached files are intended solely for the use of the addressee(s) named above in connection with official business. This communication may contain Sensitive But Unclassified information that may be statutorily or otherwise prohibited from being released without appropriate approval. Any review, use, or dissemination of this e-mail message and any attached file(s) in any form outside of the Bureau of Alcohol, Tobacco, Firearms & Explosives or the Department of Justice without express authorization is strictly prohibited.

From: Slaughter, Patricia A.
Sent: Thursday, August 18, 2011 4:13 PM
To: Firearms Technology Branch
Subject: Slam Fire/Pump Action Question

I received a call from a gunsmith apprentice asking if it is legal to modify a shotgun to operate as a “slam fire” in the same manner as the now discontinued Ithaca, Model 37, pump action, a firearm that was discontinued due to liability/safety issues. He stated he is aware there is a Chinese copy “straight from the factory” currently being imported, a 1987 Winchester. Can he legally make these modifications. Please advise. Thank you,
Patty

Patricia Slaughter
Area Supervisor
Department of Justice
Bureau of Alcohol, Tobacco, Firearms and Explosives
Louisville Field Division/Louisville II (IO) Field Office
502-753-3500

*******
NOTICE: This e-mail message and any attached files are intended solely for the use of the addressee(s) named above in connection with official business. This communication may contain Sensitive But Unclassified information that may be statutorily or otherwise prohibited from being released without appropriate approval. Any review, use, or dissemination of this e-mail message and any attached file(s) in any form outside of the Bureau of Alcohol, Tobacco, Firearms & Explosives or the Department of Justice without express authorization is strictly prohibited.

******* NOTICE: This e-mail message and any attached files are intended solely for the use of the addressee(s) named above in connection with official business. This communication may contain Sensitive But Unclassified information that may be statutorily or otherwise prohibited from being released without appropriate approval. Any review, use, or dissemination of this e-mail message and any attached file(s) in any form outside of the Bureau of Alcohol, Tobacco, Firearms & Explosives or the Department of Justice without express authorization is strictly prohibited.

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