The Marcus Magazine adapter system

[marcodelat]

... if the mag fails you are just left with a piece of worthless plastic.

No, you are left with "parts"... that it wears quickly is, in my opinion, a big downside to plastic.

I bet that in time Marcus could do a bit of research and tinkering and come up with a way (maybe a metal "tack on") to use the old USA metal mags or the DC Engineering "clips".

[1mlt]

I can see the upside of this making the mags easier to carry and install in the rifle. Not to be a fly in the ointment I also see a downside. Since the Tapco mags are plastic at some point other parts of the mag may fail feed lips ect. Without changing the mag no big deal lifetime guarantee but if the mag has been altered I assume that would void the guarantee. So if the mag fails you are just left with a piece of worthless plastic.

At 15.00 or 16.00 each I wouldn't worry about it. Just me. If you have 1 mag, and shoot everyday, 5 full loads each, that is 1,825 cycles each mag per year. HOWEVER, that is 36,500 rounds per year, per mag. you would need to shoot, I'm going to guess many 1000's, if not 100's of thousands of cycling and clicking in and out to wear out a mag. Who knows, maybe Tapco will get on board with this and decide to make the modified mags and offer the warranty. I'll also bet, they will cost more than the current duckbill mags. Marcus

[PX4Storm]

If a man was handy(or a machinist ), and wanted to drill, counterbore, and cap screw this to the receiver instead of pinning it in, is that do-able with your design?

[Lollygagger]

I bet that in time Marcus could do a bit of research and tinkering and come up with a way (maybe a metal "tack on") to use the old USA metal mags or the DC Engineering "clips".

Somebody, I don't know who said something about using a locking point that worked for both...

I can't remember just who that was . I think, whoever it was, actually worked out a personal set-up that *did* lock in both types at the same latching location...whomever that was .

LG (couldn't help myself)

[Lollygagger]

1.  They are NOT AK mags.  They are modified Tapco duckbill mags.
2.  Neither the blanks nor the white tip practice ammo (half load) would cycle the action.

What!

AK MAGS WORK WITH *MY* "PIN" ADAPTER!!!

(kiddin')

LG (had to say it -glad 1mlt's project made it to production)

P.S -*And my "signed" (engraved) complementary one is being sent?

LG, do you really want one? I thought you weren't really sold on this idea. But you (and I thank you for it) convinced me to add the second tab to strengthen the mag latch point. Also, I'm going to offer them using EITHER the cross pin or a 1/8" steel pin. Buyer's choice, same price. I'm also thinking about offering a mounting service if someone wants it. I can accept stocks w/o an FFL or C&R. Mount using my SKS steel and return it to the owner. All you need do is lock -n- load. I'll do the mag mod also if you guys don't want to do it. All it takes is a little more money. Marcus

Don't get thin skinned, Marcus (it was not meant as a comment towards you)...

I was just jerking the chain of those guys that, everytime you talk adapters, always assume the magical bolt on SKS AK mag adapter has arrived...which for technical reasons we know, is not going to happen.

LG (All better now? I expect a engraved model.)

[1mlt]

If a man was handy(or a machinist ), and wanted to drill, counterbore, and cap screw this to the receiver instead of pinning it in, is that do-able with your design?

I suppose it could be done. I opted not to do that as drilling and tapping the receiver is a permanent change to the rifle. Murray and I discussed that option using a #6-42(?) I think screw. The problem is, not very many guys could mount it themselves and that defeats the purpose of doing this inexpensively. You would need to bore the adapter a bit larger than the threaded set hole so the adapter moves on the shaft of the screw. Reason is you need to be able to adjust the adapter AFTER it's mounted. That is the magic of the adapter working correctly. Another problem you will run into is the area you need to D/T is where the adjusting screw currently rides. I suppose you could D/T the hole in the receiver, screw in some all thread, put a nut on that, use that nut to adjust the adapter and then put a nut on the all thread where it exits the adapter to lock it in place. The current hole in the adapter is threaded to 10-32.
Watch the 'how to mount' video and you will see the adjuster screw.

Marcus

[Danjal]

1.  They are NOT AK mags.  They are modified Tapco duckbill mags.
2.  Neither the blanks nor the white tip practice ammo (half load) would cycle the action.

What!

AK MAGS WORK WITH *MY* "PIN" ADAPTER!!!

(kiddin')

LG (had to say it -glad 1mlt's project made it to production)

P.S -*And my "signed" (engraved) complementary one is being sent?

LG, do you really want one? I thought you weren't really sold on this idea. But you (and I thank you for it) convinced me to add the second tab to strengthen the mag latch point. Also, I'm going to offer them using EITHER the cross pin or a 1/8" steel pin. Buyer's choice, same price. I'm also thinking about offering a mounting service if someone wants it. I can accept stocks w/o an FFL or C&R. Mount using my SKS steel and return it to the owner. All you need do is lock -n- load. I'll do the mag mod also if you guys don't want to do it. All it takes is a little more money. Marcus

Don't get thin skinned, Marcus (it was not meant as a comment towards you)...

I was just jerking the chain of those guys that, everytime you talk adapters, always assume the magical bolt on SKS AK mag adapter has arrived...which for technical reasons we know, is not going to happen.

LG (All better now? I expect a engraved model.)

And why couldnt it be done LG?

[1mlt]

1.  They are NOT AK mags.  They are modified Tapco duckbill mags.
2.  Neither the blanks nor the white tip practice ammo (half load) would cycle the action.

What!

AK MAGS WORK WITH *MY* "PIN" ADAPTER!!!

(kiddin')

LG (had to say it -glad 1mlt's project made it to production)

P.S -*And my "signed" (engraved) complementary one is being sent?

LG, do you really want one? I thought you weren't really sold on this idea. But you (and I thank you for it) convinced me to add the second tab to strengthen the mag latch point. Also, I'm going to offer them using EITHER the cross pin or a 1/8" steel pin. Buyer's choice, same price. I'm also thinking about offering a mounting service if someone wants it. I can accept stocks w/o an FFL or C&R. Mount using my SKS steel and return it to the owner. All you need do is lock -n- load. I'll do the mag mod also if you guys don't want to do it. All it takes is a little more money. Marcus

Don't get thin skinned, Marcus (it was not meant as a comment towards you)...

I was just jerking the chain of those guys that, everytime you talk adapters, always assume the magical bolt on SKS AK mag adapter has arrived...which for technical reasons we know, is not going to happen.

LG (All better now? I expect a engraved model.)

Not thin skinned at all about the AK stuff. Just trying to be specific letting them know it ain't using anything AK. And I was serious, if you want one I'd be happy to get one to you. And sure, I'll even sign one for ya my friend. Plus, I really want to thank you for the time you spent discussing the adapter with me. Making the 'tab' thickness change was the best idea to beef it up and stretch the life of the mags. I give you full credit for that. It required a slight modification to the adapter, but it was minimal.

Marcus

[Lollygagger]

And why couldnt it be done LG?

Because a AK mag is WIDER than a SKS receiver mag well (the metal receiver bottom).

...And the mags are hard to shrink.

LG (Yes -the receiver can be milled wider -but, not hardly a simple "bolt on" adapter)

[Lollygagger]

Not thin skinned at all about the AK stuff. Just trying to be specific letting them know it ain't using anything AK. And I was serious, if you want one I'd be happy to get one to you. And sure, I'll even sign one for ya my friend. Plus, I really want to thank you for the time you spent discussing the adapter with me. Making the 'tab' thickness change was the best idea to beef it up and stretch the life of the mags. I give you full credit for that. It required a slight modification to the adapter, but it was minimal.

Marcus

You are welcome...I like projects, as everybody knows.

You've done a great job of getting your concept to production. Finally, a solid production latching point for a "duckbilless" mag is arriving.

The prior attempts by Cobray (too plastic & mag too glitchey) and DC Engineering (too expensive & the adapter prone to loosen) fell short.

It is interesting that a individual comes up to bat -I always thought that individual american spirit trumphs "corporate" think.

Congrats!

LG

[steves]

just mic'ed my ati/combat exchange folding stock and the narrowest is .700 so that may help people who have the ati/combatxchange folding stock

[1mlt]

just mic'ed my ati/combat exchange folding stock and the narrowest is .700 so that may help people who have the ati/combatxchange folding stock

How wide is it say 1 1/2 inches back from that point? I hate creating more work for myself, but if it's to much I'm thinking of tapering the sides of the adapter ONLY if necessary and ONLY for certain stocks. I don't need to do it on the T6 or the factory wood stocks. This is something I'd have to do myself before they ship. I can't, won't, write another CNC program to do it. Costs me way to much money. I would consider it down the road if there is a big demand and the cost is justified.

Guys, I have a question for everyone. Which is your preferred way to mount this adapter? I understand all 3 may be used and each is entirely up to the user and their abilities.

1. The 'cross pin' which is the method you see in the video. The pin diameter is 13/64inch. The hole in you stock and adapter needs to be +1/64" (7/32")so the pin will slide through the adapter. This far and away is the easiest way to mount. I can also get the pins in black?

2. A 1/8inch steel pin. The pin diameter is 1/8inch. The hole in you stock needs to be -1/64" (7/64") so the pin is tight in the stock and adapter hole needs to be +1/64" (9/64")so the pin will slide through the adapter and move. While this drills the smaller hole, it isn't as easy to R/R the pin from your stock. You would 'tap' the pin into place using a punch for final placement. And tap it out to remove. The smaller hole in the stock 7/64" holds the pin tight in place. BUT, repeated R/R will eventually make the hole in your stock larger.

3. D/T the bottom of your receiver and use a screw to anchor the adapter TO the rifle and not do anything to the stock. This was my original idea, but it would require a gunsmith for most of us to do this type mount. I don't/can't/won't attempt this as you can't drill more than a few thousands into the receiver. It also makes the adjusting of the adapter the most difficult.

The idea is to use a method that is easy for all to accomplish.

Marcus

[Danjal]

just mic'ed my ati/combat exchange folding stock and the narrowest is .700 so that may help people who have the ati/combatxchange folding stock

How wide is it say 1 1/2 inches back from that point? I hate creating more work for myself, but if it's to much I'm thinking of tapering the sides of the adapter ONLY if necessary and ONLY for certain stocks. I don't need to do it on the T6 or the factory wood stocks. This is something I'd have to do myself before they ship. I can't, won't, write another CNC program to do it. Costs me way to much money. I would consider it down the road if there is a big demand and the cost is justified. Marcus

That or simply having the information on how to modify them for your customers Marcus. That in itself is a godsend id imagine. I'll measure the choate drag later once I find the safe keys.... this damn nyquil makes you do some funny stuff. I microwaved my bread last night and put a can of soup into the toaster oven. Top that off with putting the dishes into the refrigerator after washing them. Good stuff.

[1mlt]

just mic'ed my ati/combat exchange folding stock and the narrowest is .700 so that may help people who have the ati/combatxchange folding stock

How wide is it say 1 1/2 inches back from that point? I hate creating more work for myself, but if it's to much I'm thinking of tapering the sides of the adapter ONLY if necessary and ONLY for certain stocks. I don't need to do it on the T6 or the factory wood stocks. This is something I'd have to do myself before they ship. I can't, won't, write another CNC program to do it. Costs me way to much money. I would consider it down the road if there is a big demand and the cost is justified. Marcus

That or simply having the information on how to modify them for your customers Marcus. That in itself is a godsend id imagine. I'll measure the choate drag later once I find the safe keys.... this damn nyquil makes you do some funny stuff. I microwaved my bread last night and put a can of soup into the toaster oven. Top that off with putting the dishes into the refrigerator after washing them. Good stuff.

It's easy to do if you have any kind of electric sander. A belt sander or sanding table is the easiest and fastest to use. Both hands free to hold your work. Just make sure you take (reasonably close) the same off each side so the adjusting screw stays in the center. I'm just a picky bast*/d (rule5).

Marcus

[Danjal]

Id just mill it, but then again thats me :P