Surefire 60 round HCM - Quad Stack Magazine - New VIDEO ADDED 7-4-2011

[SC-Texas]

The first video:











These were debuted at Shot show and I havve watched the Surefire 3 Gun team using them at athe various 3 Gun matches for the past year. They worked for the 3 Gun team and they have been reliable.



The magazine was designed by Jim Sullivan and Bob Waterfield. Why is this important? Mr. Sullivan was a princiapal designer of the Armalite AR-15 and M-16, the original 20-round M-16 magazine and the M193 5.56×45mm NATO 55gr(5.56mm NATO) cartridge. The Ultimax 100 LMG/SAW is a Sullivan and Waterfield design as is the Ultimax 100's proprietary (and reliable) 100-round drum magazine.

The 60rd magazine is a tad bit longer than a P-Mag and about twice as wide:

Length8.7inches
Width1.66inches
Weight
Empty6.4ounces
Loaded2.02pounds

Here the mags, 60 and 100rd are compared with a 20rd PMAG.

Empty, it weighs about the same as a P-Mag.


I was only able to shoot about 100 rounds through the Magazine this weekend. It fed without issue.

I will get video up later this week as time permits.

 

[SC-Texas]

Re: Surefire 60rd HCM - Quad Stack Magazine

Dissasembly:

The magazine comes apart much like a standard GI magazine.

The floorplate slides out revealing the center divider.

The first thing you notice of the spring. It is circular and there are three of them.

The springs nest in each other as the top follower compresses onto the quad follower and the magazine body widens from the standard two stack to the Quad stack section.

The center divider passes though both followers as they compress.

Ease of Loading:

I have loaded 61 rounds several times. The magazine loads easily and simply stops on the last round.

It never binds.

It never loads up and gets hard to insert the next round.

It simply accepts the rounds until it is full.

 

[San Antone RR]

Re: Surefire 60rd HCM - Quad Stack Magazine

I wondered how the follower was gonna work with the narrowing mag. Thanks for the write up.

 

[Wolfwood]

Re: Surefire 60rd HCM - Quad Stack Magazine

extremely awesome.

 

[nalioth]

Re: Surefire 60rd HCM - Quad Stack Magazine

If it's aluminum, one "oopsie-fumble" and you're screwed.

 

[ChunkyMonkey]

Re: Surefire 60rd HCM - Quad Stack Magazine

give it time for magpul to make a molded version. I'm down for one of these.....would like it better at the range

 

[SC-Texas]

Re: Surefire 60rd HCM - Quad Stack Magazine

Here are a few more pictures of the 60rd mag comparing it to a C-Products 40rd Mag and two PMAGs:


Here they are end on with a tape measure.


As you can see, the 40rd C-Products Magazine is longer than the 60rd magazine.

 

[TheDan]

Re: Surefire 60rd HCM - Quad Stack Magazine

The floorplate slides out revealing the center divider.

The first thing you notice of the spring. It is circular and there are three of them.

The springs nest in each other as the top follower compresses onto the quad follower and the magazine body widens from the standard two stack to the Quad stack section.

The center divider passes though both followers as they compress.

Got any pictures of this part? Having a hard time visualizing it in my brain tube.

 

[SC-Texas]

Re: Surefire 60rd HCM - Quad Stack Magazine

You asked and ye shall receive:

 

[double_r76]

Re: Surefire 60rd HCM - Quad Stack Magazine - VIDEO ADDED

SC -- Thanks for the vdeo!

Does it hold the bolt open after the last round? I watched the video and don't recall seeing it locking back on an empty mag...

Thanks,
-Randy

 

[SC-Texas]

Re: Surefire 60rd HCM - Quad Stack Magazine - VIDEO ADDED

I don't think it did on tha weapon. That short upper is overgassed with a suppressor on it and the bolt velocity and cyclic rate is way high.

 

[Acera]

Re: Surefire 60rd HCM - Quad Stack Magazine - VIDEO ADDED

Very nice job Sean.

"Lawyer Proof", I Laughed out Loud.

 

[Texas1911]

Re: Surefire 60rd HCM - Quad Stack Magazine - VIDEO ADDED

 

[SC-Texas]

Re: Surefire 60rd HCM - Quad Stack Magazine - VIDEO ADDED



This is the video of all the 60rd Mag Dumps at the Leona 4th of July Machinegun Shoot.

 

[SC-Texas]

Re: Surefire 60rd HCM - Quad Stack Magazine - New VIDEO ADDED 7-4-2011

 

[308nato]

Re: Surefire 60rd HCM - Quad Stack Magazine - New VIDEO ADDED 7-4-2011

Wait till the Brady bunch see's those and get there panties in a wad over those assault clips.

 

[SC-Texas]

Re: Surefire 60rd HCM - Quad Stack Magazine - New VIDEO ADDED 7-4-2011

I have a lot on order. planning on keeping several for myself!

 

[SC-Texas]

Re: Surefire 60rd HCM - Quad Stack Magazine - New VIDEO ADDED 7-4-2011

Originally posted by Matt E.:
For those of you who already have mags...
Although the mag is easy to assemble and disassemble, it is not as easy as a standard mag. When reassembling the mag, it is possible to "get it wrong" or make a kink in the spring if you aren't paying attention and keeping them to the rear of the mag.
The best way to reassemble the mag is to first emplace the 2 column follower, the 2 column follower spring and 4 column follower into the mag body. There is only one way it can go.
Now, take the divider/spring guide (looks like a curved popsicle stick with a flat base) and slide it through the slot in the 2 column follower that is at the top of the mag, vic the feed lips.(as if you are loading, or stabbing the follower) You may have to flip it over and look into the bottom of the mag. Ensure that the curve of the divider is going in the same direction of the curve in the mag. Now, you should have the divider flat on it's own base,(on a table or flat surface) going through the 2 column follower from the top of the mag, which in turn will go through the 2 follower spring. You will be able to see it looking down into the bottom of the mag. Now, you have a platform in which to load the two 4 follower springs and the coupler. As the springs are compressed, the divider will remain inside the spring coils and keep them in line at the rear of the mag. Once the springs are compressed, and snapped beneath the base plate tabs, you simply pull the divider out of the top of the follower, and slide it into position at the bottom of the mag, inside the bottom 2 column follower spring, ensuring that the divider's curve is going the same way as the mag's curve. Replace the base plate. Now, load the mag. For the most part, if you have done something wrong, you will know in the first 10 rounds. Test for function.
I have disassembled and assembled the mags several times with no issues just "jamming the springs back in." It can certainly be done. However, the above TTP leaves less room for error. If you are anything like me, you don't take you mags apart often anyway. (I spent a few years in the Army, and shoot some. I have only disassembled 1, One, as in a single 30 round mag in my whole life. Just throwing that out there) But, I know guys will take these apart anyway.
Let me know if there are any questions to the above TTP. When you guys read it, it may not make sense as I wrote it, and I'll be glad to expound.

Matt E is a surefire rep and posted this on Lightfighter.

 

[TheDan]

Re: Surefire 60rd HCM - Quad Stack Magazine - New VIDEO ADDED 7-4-2011

Thanks for all the info SC! These are pretty neat. I need to pick up a couple soon.

 

[SC-Texas]

Re: Surefire 60rd HCM - Quad Stack Magazine - New VIDEO ADDED 7-4-2011

the 100rd magazine is here!