+1 metal mag extension for Hp9?

007derek

007derek

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Hello , im wondering if anyone could tell me where to get a +1 metal
magazine extension for my Norinco HP9 .. ive seen them on the EE but missed my chances!
Thanks in Advance!
007derek
 
As mentioned above...

Or Badboybeeson has some Wilson Combat(Scatter Gun Tech) +1 extensions

Note: There are some differences between the brands regarding weight and style.

Also note that the extensions are designed to work with a standard 870 with the ball bearing detent as opposed to the Express and Norc with the 'new style' ratchet cap.

If you use an extension, you have several options to keep it on tight.
-Loctite (probably would need more monitoring)
-Have a gunsmith drill the barrel ring and put a standard ball bearing in
-Or go the quick no smithing route of buying a front sling plate which has the ball bearing and screw on the extension on top(you might consider getting an extension without its own sling loop in this case)
 
-Or go the quick no smithing route of buying a front sling plate which has the ball bearing and screw on the extension on top(you might consider getting an extension without its own sling loop in this case)
Click to expand...

Don't most of the sling plates with ball detents work by pushing against the spring loaded detent on the barrel lug?

I believe dlask uses a set screw and like mentioned a ball detent could be added quite easily on the shorter barrels.
 
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Can-down said:
Don't most of the sling plates with ball detents work by pushing against the spring loaded detent on the barrel lug?

I believe dlask uses a set screw and like mentioned a ball detent could be added quite easily on the shorter barrels.
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Yes you are right by the book!

...but really the only thing one should care about is preventing the extension from backing out. There's usually enough for the ball on the plate to move and still hold the extension without it unscrewing.

Or set screw or go the proper route of having the ball detent added....

or...thread tape as Geologist added...
 
Brownells
800710990.jpg

Mfr: SCATTERGUN TECHNOLOGY

Adds One Or Two Additional Rounds To Your Remington Shotgun

Machined steel magazine extensions increase capacity without gunsmithing or permanent alterations to your Remington 870, 1100 or 11-87 shotgun. Knurled, threaded collar screws onto the end of the mag tube. Includes high-performance, extended length magazine spring and an unbreakable, high-visibility, nylon follower. Loop models features a stationary loop on either the bottom or left side of the extension to accept direct attachment of tactical-style slings without swivels. QD stud models include a quick-detach, swivel stud mounted either in the center of the magazine cap or at the front of a plate below the extension to accept slings with quick-detach swivels. All models fit 12 gauge only.

SPECS: Steel, gray parkerized finish. Fits Remington 870/1100/11-87, 12 ga. only. 1-Shot - 2" (5cm) long, 2-Shot - 6" (15.2cm) long.

Catalog page 145
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181380001.jpg

Mfr: CLARK CUSTOM

Supports Extended Magazines & Forend Cap Counter Weights

Steel band joins barrel and extended magazine tubes and keeps the additional weight of the tube from pulling gas system out of alignment. Protects extended tubes from damage, adds extra support to the magazine. Fits most single barrel shotguns with extended magazines.

SPECS: Steel, matte blued.

Catalog page 145
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FYI:

I tried using the scattergun sling plate with detent ball on my DA Grizzly.

The problem is the barrel lug is shorter on the Dominion/Norinco - thus the plates dont' fit because the distance between the magazine tube and barrel is too narrow.

Could someone confirm that they have actually fitted the Scattergun plates to a Norc/Grizzly?

L
 
lmar said:
FYI:

I tried using the scattergun sling plate with detent ball on my DA Grizzly.

The problem is the barrel lug is shorter on the Dominion/Norinco - thus the plates dont' fit because the distance between the magazine tube and barrel is too narrow.

Could someone confirm that they have actually fitted the Scattergun plates to a Norc/Grizzly?

L
Click to expand...

Are you saying that there isn't enough thread on yours to properly screw on an extension or cap after?

I and many others did not have those problems.
 
lmar said:
FYI:

I tried using the scattergun sling plate with detent ball on my DA Grizzly.

The problem is the barrel lug is shorter on the Dominion/Norinco - thus the plates dont' fit because the distance between the magazine tube and barrel is too narrow.

Could someone confirm that they have actually fitted the Scattergun plates to a Norc/Grizzly?

L
Click to expand...

Winz said:
Are you saying that there isn't enough thread on yours to properly screw on an extension or cap after?

I and many others did not have those problems.
Click to expand...


That's not what he's saying.

He refers to the vertical distance between barrel and magazine tube. A case in point: an older 870 Police (with a Wingmaster-marked receiver). On this model, the dimensions are different than newer 870s and the older Scattergun Technologies products will not fit, although they could be filed to fit easily. (The Clark barrel band won't fit on this particular 870 either.) Newer Scattergun Technologies products have been re-designed (with a lower contour) and will fit this 870 nicely. This may be the case with the Grizzly.

Imar: try another, newer, Scattergun Technologies product. I think that you can find the one that will fit.
 
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OK here's my take on it. :)

If I understand lmar's questions .... he cannot install the Wilson sling plate on his HP9. Reason being once the sling plate is aligned with the magazine tube, the top of the sling plate (the rounded part that fits under the barrel) collides with the barrel and he wonders if the Wilson 1 round mag extention would have the same problem.

Now, I have both in stock and went out to my shop to check it out.

I was able to slide the Wilson sling plate onto the front of the Wilson mag extension for comparison. It was a perfect fit to show if the rounded part of both items (rounded part again that fits under the barrel) lined up. They did not. There's a difference of .050" between them, the sling plate having more play under the barrel so to speak.

So, the Wilson 1 round magazine extention would be a tighter fit, on the two I measured. I also have both these items installed on my OEM 870s. They both fit with space to spare.

In your case, lmar, you may have a slightly thicker barrel. I don't believe the distance between the top of your HP9 magazine tube and the bottom of the HP9 barrel are different than the REMs diamensions. Otherwise Rem barrels wouldn't fit on HP9s, and they do. Well, the 18" barrels anyway.

What you can do to make your sling plate fit is this:

Get yourself a 3/4" half round fine file and start filing the rounded area of your sling plate untill it fits under the barrel. Cool? Apply some cold blue to the filed area and all's good. :) Do the same to the Wilson mag extension when you get one if IT doesn't fit.

You didn't say, but you wouldn't happen to have one of the recent Dlask made barrels on that gun? I know THEY are thicker for sure. Fore-ends need to be sanded down to slide under those barrels.

Hope this helps.
 
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easy said:
OK here's my take on it. :)

If I understand the OP's questions .... he cannot install the Wilson sling plate on his HP9. Reason being once the sling plate is aligned with the magazine tube, the top of the sling plate (the rounded part that fits under the barrel) collides with the barrel and he wonders if the Wilson 1 round mag extention would have the same problem.

Now, I have both in stock and went out to my shop to check it out.

I was able to slide the Wilson sling plate onto the front of the Wilson mag extension for comparison. It was a perfect fit to show if the rounded part of both items (rounded part again that fits under the barrel) lined up. They did not. There's a difference of .050" between them, the sling plate having more play under the barrel so to speak.

So, the Wilson 1 round magazine extention would be a tighter fit, on the two I measured. I also have both these items installed on my OEM 870s. They both fit with space to spare.

In your case, 007derek, you may have a slightly thicker barrel. I don't believe the distance between the top of your HP9 magazine tube and the bottom of the HP9 barrel are different than the REMs diamensions. Otherwise Rem barrels wouldn't fit on HP9s, and they do. Well, the 18" barrels anyway.

What you can do to make your sling plate fit is this:

Get yourself a 3/4" half round fine file and start filing the rounded area of your sling plate untill it fits under the barrel. Cool? Apply some cold blue to the filed area and all's good. :) Do the same to the Wilson mag extension when you get one if IT doesn't fit.

You didn't say, but you wouldn't happen to have one of the recent Dlask made barrels on that gun? I know THEY are thicker for sure. Fore-ends need to be sanded down to slide under those barrels.

Hope this helps.
Click to expand...
very good post, i think everyone should understand now.
bbb
 
easy said:
OK here's my take on it. :)

If I understand the OP's questions .... he cannot install the Wilson sling plate on his HP9. Reason being once the sling plate is aligned with the magazine tube, the top of the sling plate (the rounded part that fits under the barrel) collides with the barrel and he wonders if the Wilson 1 round mag extention would have the same problem.

Now, I have both in stock and went out to my shop to check it out.

I was able to slide the Wilson sling plate onto the front of the Wilson mag extension for comparison. It was a perfect fit to show if the rounded part of both items (rounded part again that fits under the barrel) lined up. They did not. There's a difference of .050" between them, the sling plate having more play under the barrel so to speak.

So, the Wilson 1 round magazine extention would be a tighter fit, on the two I measured. I also have both these items installed on my OEM 870s. They both fit with space to spare.

In your case, 007derek, you may have a slightly thicker barrel. I don't believe the distance between the top of your HP9 magazine tube and the bottom of the HP9 barrel are different than the REMs diamensions. Otherwise Rem barrels wouldn't fit on HP9s, and they do. Well, the 18" barrels anyway.

What you can do to make your sling plate fit is this:

Get yourself a 3/4" half round fine file and start filing the rounded area of your sling plate untill it fits under the barrel. Cool? Apply some cold blue to the filed area and all's good. :) Do the same to the Wilson mag extension when you get one if IT doesn't fit.

You didn't say, but you wouldn't happen to have one of the recent Dlask made barrels on that gun? I know THEY are thicker for sure. Fore-ends need to be sanded down to slide under those barrels.

Hope this helps.
Click to expand...

Thanks for your efforts to clear this up.

Both the Wingmaster and Express are 15+ years old as are the scattergun tech. sling plates.

Will try newer plates and/or judicial use of file to get mine to fit.

L
 
I think it may be a fairly common problem, but with a simple fix, just file it down 'till it fits.

If it makes you feel any better when I was in Kabul back in '03 we received a bunch of Wilson sling plates to put on our 870P's. The one in my section had basically been bashed on/bent to fit, since the 'tech who installed it was too stupid or lazy to file the plate down. Mag cap wouldn't screw on all the way to engage the ball detent since the plate had been bent forward, it was also so mangled that the plate could no longer be removed by hand.

ETA: I have three Wilson +1 rd extensions and only one will fit my HP9 without modification.
 
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