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Author Topic: That "duckbill-less" stuff?  (Read 2346 times)
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Lollygagger
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« on: October 16, 2009, 08:58:27 PM »

Well, I took off sick today and was thinking about what might be a good way to do the mod. There have been some members who have asked about such for some time -and ALOT of yadda-yadda on the topic (probalby too much yadda-yadda).

Anyway, I had avoided doing the actual mod as I considered the options (there are quite a few different possibilities with pro's & con's to each). I had not really much cared about it personally -but it has become "a mission from God" (grew on me).
So, after getting my mind visually around the concept, I proceded to work it out with a Tapco mag & gun today, based on what I would use.

I got my thinking "outside the box" -everyone tends to think about using the cut-off duckbill, or making a new seperate duckbill, or something like the DC Engineering adapter...cost seemingly a factor...

Here is mine (my "adapter"):



A HK 6mm stock "push pin" that is approximately 1 3/4" long. It is smooth with a head and a spring set in the end to hold it in place via tension. I guess similar items could be used -I liked this (and it was in the junk box).

Taking a 20 round Tapco "duckbill" mag...



I removed the duckbill about 1/2" (this is not critical) away from the mag body. Then looking at the side of the remaining piece of duck bill, you see 4 "slots" -we'll-call them "grooves", and, 5 high spaces -we'll call them "lands".
Well, the TOP 3 "lands" and 2 "grooves" are left in place -the BOTTOM is dressed down to the mag body. What this now is, in this mod, is the front locking surface. FWIW, I picked this particular location to latch the front of thre mag after examination of the relationship between the rear & front of a AK mag. (BTW, that *is* some tuff mag material -a Dremel rotary cutter and sanding drum finish fit it nicely.)

I finally drilled a hole (yes, a hole!) in my T-6 stock that I chose for the mod. Roughly, this is located 11 3/4" from the END of the stock (where it joints the "tube" ("stem") for the telescoping stock. The hole was approximately located then 1 3/4" from the TOP of the T-6 stock.

The HK PUSH PIN pushes thru the side of the stock (I did so from the right -my habit) and it's spring holds it in place (nicely -can be removed with a bullet point). Then, the mag has the front locking portion go under the pin and latch at the rear as normal.

Correctly done and fitted, the modified Tapco mag goes in and out (with the drop-free bolt mod) just as a AK mag would -even easier. And, has the added feature of the SKS BHO! The set-up is STRONG -really strong. It makes a nice slick modern rifle -I'm glad I did it.

Done so, as I chose, the weapon can be field stripped and returned to duckbill use, or, fixed mag use EASILY via removal of the puch pin.

The MAJOR ISSUE is placement of the hole and fitting of the mag to match it. This requires some skill -the project would be no more than a 4 on a 10 scale of difficulty if it were not for this...that makes it a "8-9". None-the-less, with reasonable care it can be "fished" (located) -the trick is to do this well and always make it TOO TIGHT with TOO MUCH MATERIAL...then, it can be fitted with care (material is HARD to put back).

Anyhow, there it is folks...did it on the cheap, and, without need for engineers and project designers. Laughing

I'll get around to some pics over the weekend.

LG  Cool

P.S -If what I said is understandable -you can do this (many members here can easily). If it is greek -DON'T DO IT! I don't want to be held responsibe for somebody making a mess of things. And, NO, I'm not going into production or doing it for anybody, 'cause I don't wanna.




« Last Edit: October 16, 2009, 10:48:58 PM by Lollygagger » Logged

Amat victoria curam - Victory favors those who take pains
LS6TT
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« Reply #1 on: October 16, 2009, 09:04:12 PM »

yea i didnt understandand I speak Greek. lol. looking fwd to pictures
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-Alex
Si vis pacem, para bellum

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dmac27
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« Reply #2 on: October 16, 2009, 09:08:09 PM »

Well now that seems easy enough. 
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Victory has a thousand fathers but defeat is an orphan.

---JFK
Lollygagger
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« Reply #3 on: October 16, 2009, 09:09:34 PM »

OK, here is the abbreviated greek:

You do this mod by placing a cross pin thru the stock and, with most of the duckbill cut away, stick what remains of it under the cross pin and lock the mag in place as normal.

Closer?

LG  Laughing
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Amat victoria curam - Victory favors those who take pains
dmac27
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« Reply #4 on: October 16, 2009, 09:11:40 PM »

Pictures will be appreciated!
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Victory has a thousand fathers but defeat is an orphan.

---JFK
Lollygagger
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« Reply #5 on: October 16, 2009, 09:13:52 PM »

Pictures will be appreciated!

Despite some problems with my hosting site, I will, as I said -get to them this weekend.

LG Confused (I know they help alot)
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Amat victoria curam - Victory favors those who take pains
irate
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« Reply #6 on: October 16, 2009, 10:11:56 PM »

dang, why didn't i think of that?
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Devin_Burns
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« Reply #7 on: October 16, 2009, 11:00:04 PM »

LG,

Somewhere in Texas, a man is thinking "Your project had better now work".  Laughing
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Lollygagger
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« Reply #8 on: October 16, 2009, 11:27:47 PM »

LG,

Somewhere in Texas, a man is thinking "Your project had better now work".  Laughing

It works.

I don't do some jack leg glitchey thing and offer it up as a idea. Laughing BTW, I don't have any monetary interest in my mod notions -it's jus' the way I am, but I (like the song sez) "sure don't want to hurt no one".

I don't mean to get in the way of whatever Marcus is up to -a machined adapter that is user friendly (as in easy to place in a weapon) is a fine idea.
As I indicated, the mod I offered up is not something for a novice with tools to try -I was not concerned it would be. And, it is primarily for synthetic stocked guns, anyhow -that's what I'd recommend.

That said, the mod done right should be as solid and reliable as it is going to get. It's just the good Tapco mag set well in a weapon (probably even more secure)...same functioning level as a unmodiifed duckbill.

LG  Confused (sometimes, answers are simple when you think 'em thru enuff)
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Amat victoria curam - Victory favors those who take pains
panoz77
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« Reply #9 on: October 17, 2009, 01:45:04 AM »

Kinda like this?  I didn't really understand all the Greek and I've been drinking some of grandpas white liquor so I'm kinda guessing on how the Tapco is cut, here is my best guess

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Lollygagger
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« Reply #10 on: October 17, 2009, 01:58:29 AM »

Kinda like this?  I didn't really understand all the Greek and I've been drinking some of grandpas white liquor so I'm kinda guessing on how the Tapco is cut, here is my best guess



See the 4 slots in the remaining duckbill in your (doctored) pic?

Well, imagine the BOTTOM TWO as not being there -that part of the duckbill dressed down to the mag body. Then, what remains would be the latching point.

The way the bottom of the duckbill is "cut" in your doctored pic is more like the amount of projection I have done on the mag.

I've "tapered" it to look much like the other (unaltered) back locking point on the mag.

Best, LG  Confused (I'll get some pics up after daylight -I like the softer light for pics)

P.S -I'll try to get several pics up...and just let it be. I'm not wanting to beat the subject to death.

« Last Edit: October 17, 2009, 02:08:31 AM by Lollygagger » Logged

Amat victoria curam - Victory favors those who take pains
keymastr5912
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« Reply #11 on: October 17, 2009, 09:25:05 AM »

sounds like a straight forward simple solid way to go. so obvious nobody could see it. good job lg. also does not sound like you were very sick to me. Laughing
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Lollygagger
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Posts: 6047



« Reply #12 on: October 17, 2009, 05:25:56 PM »

FWIW, I stopped while out today and cranked off a few rounds with the "duckbill-less" mag mod. I've learned to do that (test) regarding mods - as assumptions, even after having used some decent thought and taken care, can have some gremlins hidden about.

Zero problems experienced. Experienced reliable feed/cycling, BHO function and no problems changing the mag in/out.

Seems to work fine. Good.

LG Confused (I've got some pics -after I work out the glitches with my host site, I'll get them up...I'm a 'puter moron)
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Amat victoria curam - Victory favors those who take pains
magnut
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« Reply #13 on: October 17, 2009, 08:45:33 PM »

Neat!  Best solution I have seen yet.  I really like the Idea that you can pull the pin and use traditional duckbills.  I dont know if I am sold just yet on these bill-less mods but it might be fun to try.
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Lollygagger
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Posts: 6047



« Reply #14 on: October 17, 2009, 09:33:17 PM »

Neat!  Best solution I have seen yet.  I really like the Idea that you can pull the pin and use traditional duckbills.  I dont know if I am sold just yet on these bill-less mods but it might be fun to try.

Yeah, that was what prompted me to give it a go.

The HK stock push pin, a almost accidental find in the parts box, seems to have provided a easy switchback option. I don't think I would have done it if it was a permanent mod or difficult to change -as it is, it is something easy to do "in the field" (like that).

LG  Confused

« Last Edit: October 17, 2009, 09:49:45 PM by Lollygagger » Logged

Amat victoria curam - Victory favors those who take pains
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