224 Valkyrie MDT 6BR Mag feeding

[MarinePMI]

@MDT_Josh

@padom ,

So I've been dorking around with the MDT 6BR mag for the Valkyrie and figured I'd post the work/discussion here to broaden the input.

The MDT polymer mags have been giving me issues, so I went ahead and ordered a 6BR MDT mag, thinking that at least I can adjust those feed lips. After playing around with it (closing the lips lisghtly) the mag feeds well, if the round is seated correctly against the feed lips. That being said, the 3rd rd of the mag almost always causes issues (this is a mag with 6 rds loaded).

It would appear that the ammo column is what is binding. As the bolt is cycled and ammo advances up the magazine, and the column appears to be getting pushed forward. Then, a cartridge gets hung up on that deep rib (just ahead of the feed lips), which then causes the top round to dip forward slightly. A sharp smack to the mag (hey "tap, rack, bang" apparently is still a valid reaction to malfunctions) almost always solves the problem (rounds get bounced, and advance properly up the magazine walls). Looking at the follower, I'm wondering if the rear of the follower just needs to be raise a smidge(?) to keep the cartridges angled up, to prevent the binding with the rib. Ironically, once the third round is fed (malfunction drill needed or not), the mag feeds flawlessly.

Thoughts?

FWIW, the metal 6BR mags are slightly larger, and therefore tighter fitting, than the polymer ones....

 

[LtDan47]

I have had issues with my Oryx and Grendel rounds. The Grendel cartridge is even more tapered than the Valkyrie round and it seems that the 3rd rounds seems to tip down and refuse to feed. I made a contact through customer support to buy the 6br parts to adapt to my 10 round MDT mag as they were designed for a 12 round mag( I'm behind enemy lines in Commiefornia). I tried everything even making a front spacer still no go. I did however because the AICS style mag for the Ruger RPR 556 and modify the feed lips to feed the Grendel cartridge. It works ok . I used a ball mill for a Dremel tool and very slowly opening the feed lips to accommodate the shell.

 

[MarinePMI]

Do you have pics of your mod?

 

[LtDan47]

I can shoot a few for you tomorrow

 

[MDT_Josh]

@MarinePMI I am sorry for the late reply, but we have been so tied up with other projects that I have not had a good chance to play around with the 22 Valkyrie yet. I can't offer much insight at this time unfortunately

What i will say is that the 224V is an interesting case and has some unique dimensions that will probably warrant a new magazine or internal spacer kit. We have it on our radar, just need to work with it a little more!

 

[LtDan47]

Here goes, These mags are for the Ruger Precision in 556. After trying many different combinations of spacers with the MDT metal mags and giving up because of the nose diving rounds. I finally have something that works reasonably well.

For the shorter smaller diameter rounds the mag sit too low I notched the front of the mag to get it up higher and the rear of the mag I milled a slot which allows the rear to go up. The rounds picture are 6.5 Grendel which are larger in diameter then the tricky part is with a ball cutter for a Dremel open up the feed lips very carefully so the rounds sit high enough for the bolt to catch them. The rear of the mag has to be relieved for the shell base. These mags allow a real long load. Sorry I took time to post this good luck. BTW the mags are reasonably cheap compared to the standard AICS style. I think I got these for 24.95

 

[acudaowner]

not sure these will not fit your gun , but I have few and going on 2 years and not a single problem hope you can figure out what ever is causing your issues and its quick and cheap to fix .
ASC 224 Valkyrie, 6.8mm SPC AR-15 15-Round Stainless Steel Magazine
https://gunmagwarehouse.com/asc-6-8-spc-15-round-stainless-steel-magazine.html

 

[LtDan47]

not sure these will not fit your gun , but I have few and going on 2 years and not a single problem hope you can figure out what ever is causing your issues and its quick and cheap to fix .
ASC 224 Valkyrie, 6.8mm SPC AR-15 15-Round Stainless Steel Magazine
https://gunmagwarehouse.com/asc-6-8-spc-15-round-stainless-steel-magazine.html

The mag that fits the Oryx chassis is an AICS pattern mag that was intended for the 308 cartridge . The magazine ad listed above is for an AR style mag that will not work in the Oryx chassis

 

[Jackomason]

I'm going to give the ruger gunsite mags a go with the PR mag kit. I'll be sure to post what I find here. That should come in at the same price as the MDT 6br mag.

 

[MarinePMI]

I'm going to give the ruger gunsite mags a go with the PR mag kit. I'll be sure to post what I find here. That should come in at the same price as the MDT 6br mag.

I'll be curious to hear of your results.

 

[LtDan47]

I'm going to give the ruger gunsite mags a go with the PR mag kit. I'll be sure to post what I find here. That should come in at the same price as the MDT 6br mag.

If those are for the 308 round it is not going to work for the Valkyrie the Valk case is quite a bit smaller in diameter.

 

[Jackomason]

If those are for the 308 round it is not going to work for the Valkyrie the Valk case is quite a bit smaller in diameter.

They are the same magazine as the accurate mags but stamped with a ruger logo. Frank seemed to have good luck with them. The box is slightly narrower than AICS mags (from what I've read) from there it's just getting the follower moving smooth and adjusting the feed lips.

 

[D_Lamz]

I use an old Alpha 308 magazine and they work 90% of the time

 

[Jackomason]

I use an old Alpha 308 magazine and they work 90% of the time

Where do they fall short? Would a mag kit fix it?

 

[D_Lamz]

Where do they fall short? Would a mag kit fix it?

When you load the mag, further down on the stack the rounds fit loose. I've had it double feed when a loose round doesn't sit flat against the rear plate of the mag.

 

[tbugher62]

I use E-Lander mags,no problems

 

[Jackomason]

I use E-Lander mags,no problems

That sounds like a great idea, except it's not.

Edit: we are talking about AICS pattern mags for a bolt gun.

 

[Tyler Kemp]

I've had some folks request an altered mag for 224V. Taking a look at it now, but no guarantees. It is indeed a weird case.

 

[padom]

I've had some folks request an altered mag for 224V. Taking a look at it now, but no guarantees. It is indeed a weird case.

The other problem I have found is long freebore 88/90/95gr rounds run great in my MDT 6BR modified mag but short factory rounds like the 224V 75gr wont run, too damn short.

 

[Jackomason]

I just got my ruger (accurate) mag in. Trying to investigate what makes these mags work for some as opposed to the MDT mags. My first thought was that the box may be narrower internally. Turns out, throughout the taper front to back the accurate mag is .040" wider. The feed lips are 1.30" +/- long and the MDT are 1.20" +/-

I'm hopeful but if it doesnt work I've got a back up mag for $45. I'll keep everyone posted when I get further along.

 

[MarinePMI]

The other problem I have found is long freebore 88/90/95gr rounds run great in my MDT 6BR modified mag but short factory rounds like the 224V 75gr wont run, too damn short.

Which, just guessing here, means feed lip length matters based on SAAMI ammo or long seated reloads. Interesting. Sounds like a interchangeable spacer for different length rounds might be needed. Or at least some way to seat the round forward or back in the mag.

Just spit balling here...

I wonder if a trimmable wedge spacer might work....

The things you ponder when on really good prescription narcotics. ? Speaking of which, how’s the back doing @padom?

 

[bgavin]

tag

I've got the mdt modified polymer mags. They work sometimes and looking for an alternative.

 

[Chaseerickson12]

I just got my ruger (accurate) mag in. Trying to investigate what makes these mags work for some as opposed to the MDT mags. My first thought was that the box may be narrower internally. Turns out, throughout the taper front to back the accurate mag is .040" wider. The feed lips are 1.30" +/- long and the MDT are 1.20" +/-

I'm hopeful but if it doesnt work I've got a back up mag for $45. I'll keep everyone posted when I get further along.
View attachment 7142747

Does it work well?

 

[Jackomason]

Does it work well?

I've gotta apologize, life's gotten crazy getting ready for a second child and winter. I should be able to put some time into this rifle/magazine in the next month or so.