I've got an A5 and love it but it only has the flush cups on the bottom and I would love them on the sides. Can I add them? If so, is this something me or my smith can do or do I need to send to McMillan?
Gunsmithing Flush Cup Swivels
Re: Flush Cup Swivels
you can buy them from Brownells in a bag of 10 or 100, fairley cheap, like a buck or less each.
You can do it or your smith can do it. I just plunge with a 1/2" endmill to a depth that lets the cup protrude ever so slightly. FInd some screws that fit the bottom of the cup, make sure your swivels will lock in (that the screw isn't sticking up) and I simply epoxy and screw them into the stock
you can buy them from Brownells in a bag of 10 or 100, fairley cheap, like a buck or less each.
You can do it or your smith can do it. I just plunge with a 1/2" endmill to a depth that lets the cup protrude ever so slightly. FInd some screws that fit the bottom of the cup, make sure your swivels will lock in (that the screw isn't sticking up) and I simply epoxy and screw them into the stock
Re: Flush Cup Swivels
You can also buy them from McMillian. They can be put in by you or your gunsmith provided you have access to a manual mill.
You can also buy them from McMillian. They can be put in by you or your gunsmith provided you have access to a manual mill.
Re: Flush Cup Swivels
Buy from McMillan. Their swivel cups are threaded and install easy.
Buy from McMillan. Their swivel cups are threaded and install easy.
Re: Flush Cup Swivels
grovtec.com - you can buy in any quantity you want they supply most major stock makers.
if you need a tutorial let me know. i added one to a DIY page somewhere. i can find it if you need it.
grovtec.com - you can buy in any quantity you want they supply most major stock makers.
if you need a tutorial let me know. i added one to a DIY page somewhere. i can find it if you need it.
Re: Flush Cup Swivels
I got mine from McMillan but wherever you get them from follow these directions and you'll be good to go.
McMillan Flush Cup Installation
Good thread. Some interesting solutions. Here's the way I would suggest you do it, at least with our cups. The flush cups measure (O.D.) about .557" to .558". Use a 9/16" end mill or drill (.562") and drill a hole about 1/4" deep. This will let the flush cup slide in about 1/2 deep so that it will not chip the gelcoat if you try to screw it in. Then use a 17/32 drill bit and go another 3/8" deeper. This will let the threads "bite" about .015" on both sides. Then swab the inside of the hole with glue of choice, degrease the outside of the flush cup, and start the flush cup into the hole. Use a 1/4" hex wrench to screw in down into the hole until it is flush with the stock. Making the 17/42 hole about 1/8" extra deep leaves room for the glue to puddle up without oozing up into the cup. Using the threads to control the depth lets you put it right where it has to be for the swivel loop to function, and this is the reason we designed the external threaded cup that the old U.M.'s plant makes for us. Too much hassle trying to control the depth with the old smooth or grooved sided cups. Also, our cups are stainless steel to meet mil-spec rusting standards, and then blackened. The standard U.M. cups are carbon steel.
We do so many of these that I have some solid carbide stepped cutters ground on old dull 5/8" cutters that do all this on one pass. You just run it down until the lip of the full 5/8" diameter starts to kiss the stock and you are good to go. If any of you gunsmiths does a lot of these and wants one of the carbide step cutters let me know and I will get a current cost on having one ground for you.
Dick D.
A colleague and I did a couple of stocks and the whole thing took about an hour using a drill press and the required bits, in the end it looked like they were done at the factory.
I got mine from McMillan but wherever you get them from follow these directions and you'll be good to go.
McMillan Flush Cup Installation
Good thread. Some interesting solutions. Here's the way I would suggest you do it, at least with our cups. The flush cups measure (O.D.) about .557" to .558". Use a 9/16" end mill or drill (.562") and drill a hole about 1/4" deep. This will let the flush cup slide in about 1/2 deep so that it will not chip the gelcoat if you try to screw it in. Then use a 17/32 drill bit and go another 3/8" deeper. This will let the threads "bite" about .015" on both sides. Then swab the inside of the hole with glue of choice, degrease the outside of the flush cup, and start the flush cup into the hole. Use a 1/4" hex wrench to screw in down into the hole until it is flush with the stock. Making the 17/42 hole about 1/8" extra deep leaves room for the glue to puddle up without oozing up into the cup. Using the threads to control the depth lets you put it right where it has to be for the swivel loop to function, and this is the reason we designed the external threaded cup that the old U.M.'s plant makes for us. Too much hassle trying to control the depth with the old smooth or grooved sided cups. Also, our cups are stainless steel to meet mil-spec rusting standards, and then blackened. The standard U.M. cups are carbon steel.
We do so many of these that I have some solid carbide stepped cutters ground on old dull 5/8" cutters that do all this on one pass. You just run it down until the lip of the full 5/8" diameter starts to kiss the stock and you are good to go. If any of you gunsmiths does a lot of these and wants one of the carbide step cutters let me know and I will get a current cost on having one ground for you.
Dick D.
A colleague and I did a couple of stocks and the whole thing took about an hour using a drill press and the required bits, in the end it looked like they were done at the factory.
Re: Flush Cup Swivels
I am glad that I found this thread. I have flush cups on the side of my stock and think that I am going to add one to the bottom now.
I am glad that I found this thread. I have flush cups on the side of my stock and think that I am going to add one to the bottom now.
Re: Flush Cup Swivels
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: brazos609</div><div class="ubbcode-body">I thought Grovtec sold the ones with heavy threads on the outside of th ecups but I only see the ones like Uncle Mikes uses. </div></div>
grovtec sells the ones with threaded outside and the hex cut for insertion and/or threading.
i've used quite a few of them now and they appear to be a quality product. hope this helps. FWIW, the part number you see under them in the first pic is correct to my knowledge...
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: brazos609</div><div class="ubbcode-body">I thought Grovtec sold the ones with heavy threads on the outside of th ecups but I only see the ones like Uncle Mikes uses. </div></div>
grovtec sells the ones with threaded outside and the hex cut for insertion and/or threading.
i've used quite a few of them now and they appear to be a quality product. hope this helps. FWIW, the part number you see under them in the first pic is correct to my knowledge...
Re: Flush Cup Swivels
If I were going to install the flush cups from Grovetec I would recommend using the stainless steel version.
You won't wear the edges out after lots of repeated uses over time and they won't rust either.
Don't ask me how many "over time" means that is what they told me at their booth yesterday. I'b be more inclined to think that the "wearing" out would be from slowly rusting and corroding due to exposure over time than from repeatedly installing and removing the flush cup swivel.
If I were going to install the flush cups from Grovetec I would recommend using the stainless steel version.
You won't wear the edges out after lots of repeated uses over time and they won't rust either.
Don't ask me how many "over time" means that is what they told me at their booth yesterday. I'b be more inclined to think that the "wearing" out would be from slowly rusting and corroding due to exposure over time than from repeatedly installing and removing the flush cup swivel.
Re: Flush Cup Swivels
FYI...
did a DIY on this over on arfcom... i've refined the process a bit since then, but if you're doing it yourself, this may be of help.
http://www.ar15.com/forums/topic.html?b=6&f=5&t=230395&page=1
page 2...
hope this helps.
FYI...
did a DIY on this over on arfcom... i've refined the process a bit since then, but if you're doing it yourself, this may be of help.
http://www.ar15.com/forums/topic.html?b=6&f=5&t=230395&page=1
page 2...
hope this helps.
Re: Flush Cup Swivels
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: ptaylor</div><div class="ubbcode-body">I've got an A5 and love it but it only has the flush cups on the bottom and I would love them on the sides. <span style="font-weight: bold">Can I add them</span>? If so, is this something me or my smith can do or do I need to send to McMillan? </div></div>
on an A5 it is pretty simple. the forearm area has plenty of "beef" so you can mount them flush without issue. some stocks like the A3 have a pretty narrow forearm and they can be dicey if you don't dial it in just right. it isn't a problem, but you have very little room for error...
also, the pics you see are of a B&C, so the forearm is foam filled and the buttstock is hollow. those require a bit more work, thus you see the allen wrench coated in release agent, taped to hold the insert, and taped into place so the insert won't move while hardening... the manners and macs are much easier to work with in this regard.
hope this helps.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: ptaylor</div><div class="ubbcode-body">I've got an A5 and love it but it only has the flush cups on the bottom and I would love them on the sides. <span style="font-weight: bold">Can I add them</span>? If so, is this something me or my smith can do or do I need to send to McMillan? </div></div>
on an A5 it is pretty simple. the forearm area has plenty of "beef" so you can mount them flush without issue. some stocks like the A3 have a pretty narrow forearm and they can be dicey if you don't dial it in just right. it isn't a problem, but you have very little room for error...
also, the pics you see are of a B&C, so the forearm is foam filled and the buttstock is hollow. those require a bit more work, thus you see the allen wrench coated in release agent, taped to hold the insert, and taped into place so the insert won't move while hardening... the manners and macs are much easier to work with in this regard.
hope this helps.
Re: Flush Cup Swivels
Awesome guys thanks for the help. Reason I asked, I slung my rifle the other day over my back so I could drag a 150lb pig out of the woods, the bolt handle dug into my back so bad it about ruined my back, I had trouble sleeping for a couple days. Never again, flush cups on the sides are a must.
Awesome guys thanks for the help. Reason I asked, I slung my rifle the other day over my back so I could drag a 150lb pig out of the woods, the bolt handle dug into my back so bad it about ruined my back, I had trouble sleeping for a couple days. Never again, flush cups on the sides are a must.
Re: Flush Cup Swivels
Ive been looking for the threaded flush cups online, cant find them anyways. Grovtec does not seem to list them anymore.
Ive been looking for the threaded flush cups online, cant find them anyways. Grovtec does not seem to list them anymore.
Re: Flush Cup Swivels
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Furner</div><div class="ubbcode-body">Ive been looking for the threaded flush cups online, cant find them anyways. Grovtec does not seem to list them anymore. </div></div>
IIRC McMillan has them.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Furner</div><div class="ubbcode-body">Ive been looking for the threaded flush cups online, cant find them anyways. Grovtec does not seem to list them anymore. </div></div>
IIRC McMillan has them.
Re: Flush Cup Swivels
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: USMCj</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Furner</div><div class="ubbcode-body">Ive been looking for the threaded flush cups online, cant find them anyways. Grovtec does not seem to list them anymore. </div></div>
IIRC McMillan has them. </div></div>
I just shot them an email to see if they have any.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: USMCj</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Furner</div><div class="ubbcode-body">Ive been looking for the threaded flush cups online, cant find them anyways. Grovtec does not seem to list them anymore. </div></div>
IIRC McMillan has them. </div></div>
I just shot them an email to see if they have any.
Re: Flush Cup Swivels
I had to email Grov-Tec. They have them just got to ask. My order came in fast and they look good. I just need some time to get them installed.
I had to email Grov-Tec. They have them just got to ask. My order came in fast and they look good. I just need some time to get them installed.
Re: Flush Cup Swivels
hey trigger monkey, how much is that bit?
hey trigger monkey, how much is that bit?
Re: Flush Cup Swivels
tag
tag
Re: Flush Cup Swivels
Tag
Tag
Re: Flush Cup Swivels
Does anyone think that these would also work with a laminated wood stock or not?
Does anyone think that these would also work with a laminated wood stock or not?
Re: Flush Cup Swivels
Grovetec. Buy a 9/16" fine tap and stick them anywhere your heart desires!
I just use a 1/2 drill bit to drill a hole the correct depth, thread the hole with the tap and use some Devcon to make the install permanent.
Grovetec. Buy a 9/16" fine tap and stick them anywhere your heart desires!
I just use a 1/2 drill bit to drill a hole the correct depth, thread the hole with the tap and use some Devcon to make the install permanent.
Re: Flush Cup Swivels
You wish you had them on the sides....
I wish I had them on the bottom, the side mount is pretty much useless when you toss a butt-pack on the rifle...
You wish you had them on the sides....
I wish I had them on the bottom, the side mount is pretty much useless when you toss a butt-pack on the rifle...
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