Homebrew Method for Sling-Only / No Stock High-RPM Shooting

[mos]

This may have been covered elsewhere, but if so I can’t find the thread(s).

I was curious about maximizing the compactness of my SMG UZI (IMI original, ex-PD, new transferable), and the related SAS sling-only SMG technique (https://blog.refactortactical.com/blog/sling-shooting-subguns/ & https://gatdaily.com/articles/sas-sling-method/), and I came up with what I think may be a decent approach.

It requires using a thick recoil buffer add-on placed BEHIND the stock buffer on the OEM assembly. Guidance here would have you put an RPM-enhancing buffer in FRONT of that, but the trick wont work if you do, or at least not as cleanly.

With no stock mounted, take a semi-auto buffer cut down to .75” or 1” width (depending on how much additional RPM you may be seeking, or willing to tolerate) and also cut out the bottom of the large hole, making an upside-down U in the area that immediately abuts the receiver hole. Insert it BEHIND the stock buffer. This will allow you to thread a loop through the receiver hole without the material the loop is made of coming into direct contact with the OEM buffer, and so won’t (or shouldn’t???) distort the plane which the OEM buffer presents to the rear of the bolt.

The OEM buffer could go behind the insert, but then the insert tends to move around in the receiver… could be fine, but makes me queasy. Putting it behind the OEM one keeps it seated flush with the rear receiver wall without any additional fixes (saw something about a dab of JB Weld to keep it in place… I will pass on that).

A Blue Force Vickers SMG Sling will thread right in there cleanly, and the resulting setup provides a pretty rock-solid forward extension that gives you 3 points of contact if you snug your cheek down onto the sling.

I’ve shot it SA this way, just to test the impact on the OEM buffer to detect off-plane presentation, and it seems fine. Will test FA next.

Not planning on keeping it configured this way, but it’s definitely interesting to fully understand how versatile this little bullet-hose can actually be!

Question for all the many (MANY) more qualified people here… am I at risk of damaging my bolt this way, or is this sane? Would love a gut-check before I rock-n-roll with it.

Thanks in advance, and cheers!


mos

 

[mos]

Really, y’all??? Nobody has a thought on this???


mos

 

[Caverpete]

Seems like it would work fine! Also would probably work with a Mini that has been welded up with a full sized rear section.

 

[Slowmo]

Couldn’t you just use the existing bolt hole to attach a sling swivel to the rear plate?

 

[slimshady]

That's what I was thinking, I seem to recall an off the shelf solution to use one of those quick disconnect socket type mounts.

 

[Slowmo]

Even just an eyebolt could do it. They make some that are hinged to lay flat.

Ring Bolts

Found on Bing from www.fisheriessupply.com

sl.bing.net

 

[Member13]

Really, y’all??? Nobody has a thought on this???


mos

why not just use a stock?

 

[mos]

Couldn’t you just use the existing bolt hole to attach a sling swivel to the rear plate?

I tried that, but It depends on how far into the receiver the attachment itself goes. Without increasing the net buffer thickness, you only have the width/thickness of the OEM buffer pad to work with. When I attached the Vickers SMG sling that way, even the plastic-sheathed cable loop was thicker than the OEM pad, which would cause an uneven surface to be presented to the rear bolt face. No bueno, I think.

 

[mos]

why not just use a stock?

Sure... of course... but this is an exercise in the art of the _possible_!!!

 

[mos]

Even just an eyebolt could do it. They make some that are hinged to lay flat.

Ring Bolts

Found on Bing from www.fisheriessupply.com

sl.bing.net

Unless they are hinged to lay flat _inside_ the receiver, the same thickness/width issue and bolt-facing surface problem exist.

 

[Slowmo]

Unless they are hinged to lay flat _inside_ the receiver, the same thickness/width issue and bolt-facing surface problem exist.

Why would you put it inside the receiver? Just attach a connection point to the back of the receiver with the threaded hole.

 

[Dirk Hawthorne]

regarding damaging your bolt

people speed up UZIs pretty often and I don't think I've seen any damage reported.

taking a guess, I would bet that the receiver welds would crack before the bolt deformed

and it would probably take a really big round count to do it if the welds are good

the UZI is a robust and durable gun, so you'd probably see a fatigue failure of the welds before you had any kind of ductile failure of the base metal

 

[mos]

Why would you put it inside the receiver? Just attach a connection point to the back of the receiver with the threaded hole.

I was responding to the ring bolt idea, which isn’t the same as what you’re suggesting.

Since there is no threaded hole unless unless you use the nut assembly that’s part of the folding stock design, I assume you mean why not use one of those. Fair question, if so!

For me, playing around with this is also partly about determining which configurations are quick-change / compatible. For example, rigged as I described, I can take the sling off the rear receiver-face in literally under 3 seconds and slap on a wood or poly QD stock in about the same amount of time. A nut assembly sling attachment-point would require use of the folding stock vs. QD, AND it would take minutes (and tools) to switch between. I like the folder on my SA SBR UZI okay, but as others have hinted at, for FA I too like a fixed one instead.

 

[mos]

regarding damaging your bolt

people speed up UZIs pretty often and I don't think I've seen any damage reported.

taking a guess, I would bet that the receiver welds would crack before the bolt deformed

and it would probably take a really big round count to do it if the welds are good

the UZI is a robust and durable gun, so you'd probably see a fatigue failure of the welds before you had any kind of ductile failure of the base metal

Thank you for that, @Dirk Hawthorne! I appreciate the confirmation that all will be well and I likely won‘t f**k up my baby this way. Imma go try it out as soon as I can make the time!