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Standard Products Triggers.

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New2brass View Drop Down
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Dan Pinto, Photo Editor

Joined: Nov 29 2015
Location: CT
Status: Offline
Points: 3589
Post Options Post Options   Thanks (0) Thanks(0)   Quote New2brass Quote  Post ReplyReply Direct Link To This Post Topic: Standard Products Triggers.
    Posted: Sep 20 2018 at 4:14pm
There are 3 documented subcontractors to Standard Products for triggers.

H&R Machine Co. with known markings of S-HR, SHR and S-HR in oval. The H and R are joined. 
Not listed is S HR (no dash with space) but I have observed.
Conn Tool & Products with a marking of S-C and SC
Able Tool Co. with known markings of SA, S-A and S=A

There have been reports of S-HB which may have been an error in reporting and really S-HR

There have been many reports of SH (no dash) and HR . The theory is that these were H&R machine with partial stamps or a stamp used during a certain period.
To make maters more interesting is that IBM used H&R Machine as well and the mark has been reported only as HR. I will have more on that in a separate post.

This information was pulled from data sheets going back 40 years. Today we have the advantage of digital photography as well as an easy medium for sharing.

To add to the confusion Springfield Armory also produced a trigger with the SA marking. We have a clue as how to tell the difference, but would also like pictures of these as well to compare to the Able Tool Co. SA marking as well as the machining marks. 

If you have any of these unknown marks please let me us know so we can better scrutinize the markings.

Currently I have S HR(space with no dash), S-C and S-A as well as what I believe to be a Springfield SA

 I would be interested in borrowing or purchasing the others to photograph and compare machine marks.


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W5USMC View Drop Down
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Joined: Apr 29 2017
Location: Missouri
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Post Options Post Options   Thanks (0) Thanks(0)   Quote W5USMC Quote  Post ReplyReply Direct Link To This Post Posted: Jun 01 2021 at 9:43pm
Dan, not sure if you need this S=A trigger, it is currently listed on ebay.

Wayne
USMC Retired
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