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  #1  
Old 05-27-2013, 7:23 AM
Dhoggs Dhoggs is offline
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Default Promag C stock for Benelli M4

Is there anybody here who installed or bought the Promag collapsible stock which is advertised to be 922.R compliant for the Benelli M4? I need your thoughts on this product before I pull the trigger in getting one, pinning it and installing it on my M4 which is still in jail

I know this is a knock off from the original Benelli C stock but.... Im not going to spend $500-800 on an oem Benelli C Stock just to have it pinned.
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Old 05-27-2013, 6:27 PM
mavericksun mavericksun is offline
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My understanding is that in Kalifornia a shotgun can not have both a collapsible stock and pistol grip. 922.R is a Federal law, not a Kalifornia law. So even if you are 922.R compliant, you still need to pin the collapsible stock if you have the pistol grip.
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  #3  
Old 05-27-2013, 6:41 PM
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Collapsible stock is a no-go on an M4 in California.
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  #4  
Old 05-27-2013, 7:05 PM
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If everyone would read the original post, I believe it is going to be pinned?

Anywhoo, I have seen reviews on the Benelli forum about it.
http://www.benelliusa.com/forum/show...inally-Arrives
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Old 05-27-2013, 7:36 PM
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why do this if you have to pin it ? anyways I went with the mesa tactical with limbsaver pad.
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Old 05-27-2013, 7:46 PM
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In the case for the M4 is about completing the look. I can relate to that.
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Old 05-27-2013, 10:05 PM
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^ This. ^ It's for the looks and for the shortened LOP.

As I mentioned on my original post, the collapsible stock is to be pinned this is why I am not willing to spend a large chunck of $$$ for an oem Benelli C stock.
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Old 05-27-2013, 11:10 PM
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Quote:
Originally Posted by Dhoggs View Post
^ This. ^ It's for the looks and for the shortened LOP.

As I mentioned on my original post, the collapsible stock is to be pinned this is why I am not willing to spend a large chunck of $$$ for an oem Benelli C stock.
My mistake, I read your original post wrong. I thought you meant 922R would make it legal in CA. Just looked at the pro-mag site, they seem to sell it as a kit along with the forend. Quality of build and actual 922R compliance seems to be the issues people talk about (no "Made in USA" stamp).
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  #9  
Old 05-28-2013, 6:57 AM
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I'd be interested in learning how you intend to pin a factory style collapsing stock.
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Old 05-28-2013, 7:23 AM
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I'm guessing it's same as when you pin a collapsing stock for AR's. There are a few videos in youtube showing how this is done. I could be wrong though.
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Old 05-28-2013, 7:24 AM
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Quote:
Originally Posted by Dhoggs View Post
I'm guessing it's same as when you pin a collapsing stock for AR's. There are a few videos in youtube showing how this is done. I could be wrong though.
It's nothing like pinning a stock for an AR. That's why I ask.
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Old 05-28-2013, 9:00 AM
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Midway USA will have this on stock next month for $121.99. For that price im willing to buy it and try pinning it. Im sure there is a way to pin it.
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  #13  
Old 05-29-2013, 7:25 AM
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What you might try is removing the adjustment button (it's secured in the factory stock by a split pin) and drilling a hole through the housing to accept a bolt that can engage the adjustment groove on the recoil spring tube. This bolt has to be exactly the right diameter, small enough to engage the groove and large enough to ensure the stock doesn't wiggle or move when the bolt is secured in place (the factory adjustment button is a spring loaded taper, so it securely engages the groove when released). The hole has to be drilled precisely co-radial with the adjustment button hole to engage the groove properly.

If you could get this to work, I suppose it would be legal, since if the bolt was removed the stock would basically flop around and fall off. But I've never tried it, and never seen it tried.
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Old 05-29-2013, 8:23 AM
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Quote:
Originally Posted by Killer Bee View Post
if you can locate the recoil tube that does not have the grooves that allow the forward locking positions for the butt stock then it would conceivably be non-collapsible as far as practical minded folks would be concerned.. but whoever 'they' are is the real question in these discussions. I personally wouldn't trouble myself with movement as far as takedown and assembly so long as the stock would not lock in a usable forward position..

Yeah, I took that photo. There are two problems with using the single position recoil tube:

1. Many (most? all?) Benelli M4s now ship with the three-position tubes; and

2. The LoP with that set-up is nearly 14 inches.

Otherwise, I can't think of any legal restrictions with using the "collapsing" stock on the single position tube, despite the concerns of some of the people in the thread you posted. It's just not very practical.

Quote:
Originally Posted by Killer Bee View Post
another view of the tube differences by model number.. gives you a peak inside if you're apprehensive to twist your stock off before buying the c stock..

That's a great photo. The middle one was what was originally issued to the USMC. It had two positions, too long and too short. The Stock of Fail.
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Old 05-29-2013, 10:06 AM
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The OEM stock is too long and pinning c-stocks are too much trouble for questionable gain. The Mesa Urbino is not perfect but its the best option for me.
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Old 05-29-2013, 7:43 PM
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Quote:
Originally Posted by jessegpresley View Post
The OEM stock is too long and pinning c-stocks are too much trouble for questionable gain. The Mesa Urbino is not perfect but its the best option for me.
me too
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Old 05-30-2013, 4:08 PM
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I have the model 11707 so I have the 3 position recoil tube. As soon as midway have them on stock I will purchase it and will start working on it. I will keep you guys updated and will post pictures of the final outcome (fail or not)
Thanks for all the response guys! This is why I love this community
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  #18  
Old 05-30-2013, 9:34 PM
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Default Pinning A Stock

I've pinned my Benelli M4 collapsible stock. This is how I did it FYI.

1) Remove button from stock assembly.

2) Drill (through button) and tap for a 4-48 set screw. Tap only deep enough to let set screw be flush with top of button



3) Re assemble stock and position it to your preferred LOP

4) Drop a 3/32 dia pin into tapped hole. Length of pin determined by length of set screw your using.



5) Install set screw



6) Done


Last edited by fmlyman; 05-30-2013 at 9:39 PM..
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Old 05-30-2013, 11:29 PM
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What's the LOP?
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Old 05-31-2013, 6:58 AM
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Quote:
Originally Posted by fmlyman View Post
I've pinned my Benelli M4 collapsible stock. This is how I did it FYI.

1) Remove button from stock assembly.

2) Drill (through button) and tap for a 4-48 set screw. Tap only deep enough to let set screw be flush with top of button

3) Re assemble stock and position it to your preferred LOP

4) Drop a 3/32 dia pin into tapped hole. Length of pin determined by length of set screw your using.
Damn, clever.
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Old 05-31-2013, 10:59 AM
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Thanks fmlyman! You just saved me lots of time and headache!!!
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Old 05-31-2013, 12:16 PM
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Quote:
Originally Posted by Dhoggs View Post
Thanks fmlyman! You just saved me lots of time and headache!!!
Work quickly, though. While the stock is on a multi-position recoil tube and you are working on the button, you are in possession of an assault weapon.
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Old 05-31-2013, 5:33 PM
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Not if I work on it while it's field stripped
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Old 05-31-2013, 5:43 PM
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Quote:
Originally Posted by Dhoggs View Post
Not if I work on it while it's field stripped
yea h remove the evil pistol grip
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  #25  
Old 06-01-2013, 6:27 PM
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Quote:
Originally Posted by jdben92883 View Post
Collapsible stock is a no-go on an M4 in California.
You can set it and pin it, then it is a go-go in this rat head p.o.s state.
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Old 06-01-2013, 6:30 PM
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Quote:
Originally Posted by jessegpresley View Post
What's the LOP?
Length of Pull. Distance from the back of the stock to zee trigger.
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Old 01-31-2014, 9:22 PM
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I know this is an old post but does anyone have additional input on the ProMag C stock? Anyone purchase and install one recently?
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Old 02-20-2014, 4:34 PM
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Quote:
Originally Posted by btell View Post
I know this is an old post but does anyone have additional input on the ProMag C stock? Anyone purchase and install one recently?
Promag is GTG. I've handled both.
The finish on the Promag had a little more gloss to it. Otherwise the fit and function were the same. The grip assembly is similar to the factory unit. Heck, swap a Benelli butt pad on the Promag and you'd be hard pressed to tell the difference.
The included forend looks like a factory piece modified with rails. I can't help but wonder if some of the parts are from the same factory source.
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  #29  
Old 02-20-2014, 10:23 PM
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Thank you very much!
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  #30  
Old 02-20-2014, 11:07 PM
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Quote:
Originally Posted by epilepticninja View Post
Length of Pull. Distance from the back of the stock to zee trigger.
I was wanting to know what the LOP was on the c-stocks.
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