Reliability of Flush Cups?

[Hondo64d]

Might not be too late to amend my McMillan order and was wondering what folks' experiences with flush cups are.

Anyone ever had one let loose while slung?

Rugged and reliable?

Seems like a rifle might sling a bunch nicer with flush cups installed in the side opposite the bolt handle rather than conventional sling swivel studs on the belly.

Your thoughts?

John

 

[fargo007]

Re: Reliability of Flush Cups?

I think flush cups are plenty reliable and strong. The ability to quickly detach them lends other important uses as well.

I have them on all my rigs and I have never had an issue with them.

One might even argue they are stronger than a screw-in stud to which a traditional sling swivel would be attached, but I'm no engineer.

--Fargo007

 

[BlackOps Tech]

Re: Reliability of Flush Cups?

I've seen them let loose (as far as the swivels coming out of the cup), but it was never because of a fault in the cup itself. Basically, if the cup is seated to the correct depth in the stock, and there's no paint or other gunk in the cup, they'll serve you extremely well.

 

[jhead7416]

Re: Reliability of Flush Cups?

I am beginning to change some of mine out over the last year. SO far so good.

 

[Mr Flannel]

Re: Reliability of Flush Cups?

I had a problem with one - once. Kept letting loose and I couldn't diagnose the problem with it. Didn't have any crud or paint in it and it appeared to be set to the correct depth but tried sanding back little by little around it to see if that would change things. Nada. Tried different slings, same thing. Guess it was just plain out of spec.

Other than that, no issues at all.

 

[carbinero]

Re: Reliability of Flush Cups?

I've had no problem with QD function. The only issue I'd be concerned with is proper installation, which should be a non-issue with McM.

 

[mark5pt56]

Re: Reliability of Flush Cups?

The larger profile of the heavy duty ones have a wider surface area on it's face where it contacts the stock. The smaller low profile ones are the same diameter as the flush cup. You may have to "mate" the surface if you have a seating problem. I always seat it and give it a good tug to make sure it's locked in.

 

[lazy21]

Re: Reliability of Flush Cups?

this happened to me..............

 

[Tbag]

Re: Reliability of Flush Cups?

Lazy were you able to catch it before it hit the dirt? That is if it was slung up.

 

[lonely_wolf]

Re: Reliability of Flush Cups?

Lazy,

Can you give details about how that happened.

It looks like you were using the quick detach sling swivel in the flushcup. I was planning on doing the same thing to mount my Harris. I though it would be a brilliant way to have a flat stock, but still be able to use a Harris.

Did the Harris just tear it rght out with the swivel? Did it get loose over time and pop?

 

[vman]

Re: Reliability of Flush Cups?

I have wondered If anyone that uses flush cups mounted on the side of the forearm has had any failures whilst using their sling in position.

Considering doing some installs on some other stocks I have as Im a big fan of biathlons as it helps during long days or multiple days in the field.

I currently run HK type hooks, and as you could imagine these hook points will never come off an AI chasis.

Lazy21, from the threading on that swivel stud I would assume it would be similar to a heavy duty swivel cup... thats a little demoralising to see. I have not seen that type before as all of the sling studs I have installed utilise a threaded nut which sits bellow the barrel inletting.

 

[lonely_wolf]

Re: Reliability of Flush Cups?

Lazy, this is what you were using, correct?

http://www.triadtactical.com/Multi-Adaptor.html

Picture is down, but can be seen in the product list (First one):
http://www.triadtactical.com/Rifle-Slings/?page=2

 

[discrota]

Re: Reliability of Flush Cups?

Looks like a GT™ Multi-Adaptor Swivel Stud, made by GrovTec. Great product.

Manufacture's listing:
http://www.grovtec.com/products_swivel_pairs.php

Lazy21, fill us in on how that happeded I would like to know more about it.

 

[lazy21]

Re: Reliability of Flush Cups?

The stock was brand new when this happened, I put one of those qd studs. I mounted my harris and when I flipped it open my qd stud became a qd flush cup

and just came right out. Sent it back to McMillan to get a stud installed(hope I get it back by the end of the week). I would never dare try to put a sling on it after this happened, apparently the flush cups are not screwed in. They're held by epoxy...........

 

[vman]

Re: Reliability of Flush Cups?

I thought It was a careful mixture of both... a slightly undersized hole the accept the threading, with a careful amount of epoxy.

 

[lonely_wolf]

Re: Reliability of Flush Cups?

How would the regular stud be any better? I thought they were installed the same way- screwed in with epoxy...

 

[bm11]

Re: Reliability of Flush Cups?

I haven't heard of any failures before this thread, however, I can see where if a flush cup swivel got wet and then it got cold, it could cause a freeze, making it impossible to remove.

The HK hook is such a simple and rugged design, and my rifles are set up to accept them, that I really think they are the best option.

 

[Rob01]

Re: Reliability of Flush Cups?

Witchita sling swivels if you want strength. They screw into a steel piece embedded in the stock.

 

[Ratbert]

Re: Reliability of Flush Cups?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: bm11</div><div class="ubbcode-body">

The HK hook is such a simple and rugged design, and my rifles are set up to accept them, that I really think they are the best option.</div></div>

Are you using actual HK hooks with that or something more reliable like a MASH hook? HK hooks depend on the spring keeping the latch closed. Not uncommon for it to break and come unhooked. A MASH hook or a locking carabiner style hook (like RapidStrap sells) is much more reliable if you want that kind of attachment. I personally have started using Blue Force Gear wire loops on any gun setup for HK hooks (eg AI) because I find it much more flexible and comfortable when actually using the sling for support.

 

[bm11]

Re: Reliability of Flush Cups?

I will have to look into that. I am currently using spring type HK hooks. I have been happy with them so far, but am always on the prowl for the next best thing.