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A Hybrid Sling Design
June 2014
Dan Martinez

How many of you have ever thought about, or actually tried your hand at leather work? Making your own rifle sling has got to be one of the easiest ways to get started with leathercraft.

This is a new hobby that I’ve been dabbling in lately. It kind of started when I decided to make my own shirt pocket eyeglass case. I had been using the cheap vinyl ones for a number of years. Over time, they start breaking down on the top edge, getting ratty and ugly. One day, I just got fed up with my latest broken-down vinyl case and decided that I was going to make my own out of leather.

So I hopped down to Tandy Leather at 35th Avenue and Greenway Road and bought a suitable sized piece of leather and a sewing awl. This is a super simple project. Using the old vinyl case as a pattern, I cut out the leather, folded it over, and sewed down one side and across the bottom. Voila! One nice leather eyeglass pouch that will last for a very long time! The leather took on a beautiful medium brown hue after rubbing in a generous amount of leather oil.

I wrote last month about acquiring a second Remington Model 600. My first M600, the 6mm, came with a Hunter brand commercial copy of the M1907 military type leather sling. It may be the only sling the rifle has ever known. I never used it how a military sling is supposed to be used. Only recently have I done some research to learn exactly how to use a military sling to steady your shots. On the 6mm, I simply adjusted it once to a length of my liking, and locked the length by lacing in a piece of leather bootlace through some of the holes. I used it purely as a carrying strap, and was happy as a clam.

When the .308 Model 600 came home, it did not have any sling swivels, so therefore it had no sling. Since I was happy with the look of a classic leather sling on the 6mm, that’s also what I wanted on the .308.

Alright, maybe I was not TOTALLY happy with the sling on the 6mm. Since I had tied it into a fixed length for carrying over my shoulder, when I wasn’t carrying the rifle, the sling would hang off the rifle in a big loop. I wished that there was a way that I could adjust the sling to a shorter storage length for when I put it into a rifle case, for example.

For those of you who understand the proper configuration and use of the M1907 rifle sling, you know that shortening it so that it runs in a tight line from the front sling mount to the rear is easy. But again, I had never figured that out, and I had laced it into a fixed length anyway.

If you don’t understand the proper configuration and use of the M1907 military rifle sling, don’t feel bad. It’s kind of complicated.

The M1907 style is a two-piece sling. When it is pulled tight into the storage position, there are as many as four layers of sling lying on top of each other! That’s a lot of leather.

The M1907 is popular with high power rifle competitors because it can be configured to create a bicep loop that cinches down tightly on your upper arm. This bicep loop helps to pull the butt of the rifle tightly into your shoulder and helps aid stability in the prone, kneeling, and sitting positions.

You can go ahead and call me stupid if you want, but for a hunting rifle, all I really want is a carrying strap. I’m not interested in monkeying around with my sling to tighten it around my bicep to get into a textbook shooting position when the moment of truth pops up
The classic Model 1907 military rifle sling on a M1 Garand

Still, the M1907 has a very classic “old school” look to it with the brass (or steel) “frogs” and the many holes all up and down the sling. The rows of holes allow you to adjust the sling length by moving and inserting the frog’s “feet” into the various hole pairs up and down the length of the sling.

My interest in foreign military surplus rifles had acquainted me with the much less complicated sling for the Swiss K-31 straight-pull bolt action carbine. The Swiss do not use the sling as a shooting aid. It is simply used as a carrying strap. What I like about that sling is the way it can easily be pulled into a straight and tight storage position lying next to the stock, but then it can also be quickly pulled open into the long strap-over-the-shoulder mode. It accomplishes this with a keeper loop that is attached to one tail of the leather strap near the front sling mount.

So I got the idea to make a hybrid of these two slings. The fore-end side of the sling would use the Swiss K-31 system, while the buttstock end would use the U.S. M1907 system to allow adjustment of the overall sling length.

Since I was having fun with leathercraft, my plan was to build such a sling from scratch. Tandy Leather has various sized belt blanks which would make a great foundation. They even have the frogs. But to attach the frogs, I would need rivets and the necessary rivet-setting tools. To make holes for the rivets, plus all the holes for the frog’s feet, I would need a leather hole punch.

To make the sling look a little more interesting than just a flat strap, I also picked up a tool called a stitching groover. This tool can be adjusted to create a shallow groove at some fixed distance that you set, from the edge of the strap. One other tool that I picked up was an edge beveler, which slices off a very thin strip from the 90° edge of the strap to give it a more finished look.

So upon coming home from the leather store and spreading out all my newly purchased treasures in front of me on the coffee table, I started thinking about how to get started. I realized that I would need some sling swivels.

Right: Scratch-built hybrid sling on the left, modified commercial sling on the right

I have accumulated a pile of old rifle slings over the years. I used most of them for one or two seasons, then decided that I didn’t like them after all for whatever reason. Most of these slings had sling swivels attached to them.

So I raided the collection of old slings for the purpose of scavenging all the sling swivels that I could. But in my raiding I came across another commercial M1907 style sling that I had picked up a few years ago, but had never used on any rifle.

I figured that this would be a good model for the hole locations and spacing at least, so I grabbed it to take to my leather working table.

But then a funny thing happened. As I was taking the sling apart and separating it into its constituent components, I realized that the long strap of the sling was at least 90% of the way toward what I was trying to create with the hybrid sling design. It would be a lot easier just to modify this sling, than it would be to build one up from scratch. In fact, the only thing that I would need to do would be to install the fixed keeper band at the end of the long strap opposite to the frog.

With the hole punch, I punched two new holes toward the tail end of the sling. I used one of the keeper loops supplied with the sling, which I riveted in place using the riveting tools. Voila again! I now had one very cool Swiss K-31/U.S. M1907 hybrid sling. Below is how it works:

Pulled tight into the storage configuration:

Opened up into the hunter carrying configuration: A simple, clean, single strap.

With my hybrid design, you end up discarding the short strap of the M1907 sling, thereby reducing weight and complexity – always a good thing. One of the negatives of the standard M1907 configuration from the hunter carry perspective is that the smooth side of the leather is against your shoulder. But to prevent slipping off the shoulder while walking in the field, it is better to have the rough side of the leather against your shoulder. This new design accomplishes that goal.

Inspired by the Swiss K-31 sling, the forward end has a fixed keeper riveted to the front tail of the sling. By pulling down on the tail tab, the sling is tightened from the carrying configuration into the storage configuration.

Detail of the buttstock end. This is the U.S. M1907 inspired part of the sling, with brass frog. This first prototype started as a M1907 style sling, so there is a series of frog holes up and down the length of the sling. This allows overall sling length adjustment to fit rifle and shooter. Also shown is a hand-sewn keeper loop.

So with the rapid prototype executed and the concept proven, it was time to turn to duplicating this design from scratch. Using the finished hybrid sling as a template, I copied the length (44”), the hole locations, and the placement of the fixed keeper. I created the decorative groove around the entire edge of the sling which sort of simulates the line of stitching on the commercial sling. Riveting the frog in place was simple and easy using the hole punch and the rivet setting tool. I used a piece of 1” steel strap as a backer when setting the rivets. Perhaps the hardest part was sewing up my own keepers. A liberal application of neatsfoot oil finishes the sling.

The commercial sling that I started with is a Bandera brand, available at Sportsman’s Warehouse for under $35. It is 1¼” wide. To make the scratch-built sling, I used a 1¼” wide veg-tanned belt blank. I think the one I used was 50 inches long to start, which I trimmed down to 44”.

The Hunter brand sling on my 6mm is a 1” wide sling. Although I prefer the 1¼” width, I converted the 6mm’s Hunter brand sling into my hybrid sling design. Since the rifle appears to have been mated with this sling for many years, I saw no need to break up the happy relationship.

After finishing two scratch-built slings of my hybrid design, I’m not sure it was worth it.

While definitely fun and satisfying to roll my own, I think that I am happier with how the modified Bandera sling came out. Plus, the Bandera sling comes with two sling swivels. By the time you add the cost of two sling swivels purchased separately to the cost of the components of the scratch-built sling, you are approaching the cost of the modified commercial sling. The feeling of accomplishment of making your own is wonderful, but if functionality is the driver, then it is easier to start with a store-bought sling and modify it.

I’ve really been thrilled with how this sling project has turned out. It seems to be a genuinely useful new sling design for the hunter that I’ve seen nowhere else.

For old school rifle marksmen, it is still capable of use as a loop sling. Just disconnect the buttstock quick-release sling swivel, move the frog up toward the fore-end attachment, and you have a bicep loop with sliding keeper. Also shown in this photo is the discarded lower sling piece from the original M1907 sling configuration.

Photo from last month’s story: Unexpectedly, I discovered another way to use this sling design for shooting stability. By sliding your hand into the front loop that is formed when the sling is pulled into the storage configuration, you can use the edge of your hand against the riveted keeper to pull the rifle back into your shoulder. Despite how it may look in the photo, the grip of the support hand on the fore-end is relaxed. This allows the arm and shoulder muscles to do most of the work. The front loop can be quickly adjusted to vary the position of your hand on the fore-end for personal preference. When rearward pressure is thus applied, there is no slippage of the front loop.

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