Author Topic: SAFETY ISSUE using Hunter 440 wood stock on a Whisper!!! (or other syn. Gamos)  (Read 19597 times)

Offline CO_AirGunner

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I received a Hunter 440 stock on Friday that was destined to go onto my Whisper.  I didn't realize how much the comb on the factory Whisper stock bothered my grip.  The pointy end of the comb is right where I like to rest the meaty portion of my hand right below my thumb.  I didn't realize that I had been shifting my grip around in order to avoid this part of the factory Whisper stock until I received the Hunter 440 stock.  Here is what she looks like with the new stock:



I like the Hunter 440 stock MUCH better!!! It just feels better to me.  The wood dampens vibration far better than the hollow composite factory stock, and it just looks dang $exy!!!  I highly recommend this mod to the Whisper, however there is a safety issue that MUST be addressed if you make this mod.  Using the Hunter 440 stock, the pin in the rear of the action that holds the guts inside of the receiver has about 0.10 inch of clearance on both sides and is free to move.  This is due to the fact that the Hunter 440 has a plastic cap that slides over the end of the action thus trapping the pin from movement, and the stock is cleared for that cap.  This cap serves to hold the pin from lateral movement once bedded into the stock, as the wood of the stock supports the plastic on the outside.

 I don't have one of the 440 end caps, and just put the action into the stock without the cap.  After I received the stock and installed it, I had an extended shooting session over the weekend with my father-in-law, who owns a Hunter 440.  I'd estimate I made about 100 shots. After we were done, I noticed that the main pin had moved considerably to one side; enough so that it had almost cleared the opposite side of the receiver!  Yikes!  This could easily lead to a failure, and one that could seriously hurt the shooter (imagine a cocked rifle letting the rear spring guide loose out the back of the rifle...).  In the picture below, you can see the pin I'm talking about in the center:



I want to make sure that the community is aware of this potential SERIOUS problem.  I plan to try and get one of the 440 end caps, but if I am unable to do that, I will make a Delrin cap myself.  PLEASE make sure to remedy this on your rifle if you do this mod!!!

Other than this issue, this is basically a drop-in modification.  The little spacer (~ 0.050" plastic washer) on the cocking linkage roller needs to be removed when switching to the wooden stock also, but that isn't a big deal at all.  Don't forget to use lock-tite!!!
\"Engineers don\'t idle well.\"

If guns get outlawed, only the outlaws will have guns. You don\'t want that, do you?

Offline dnttech

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Thanks for the heads-up, Jared. I've got a 440 stock I received last week which is going to go on my son's Viper.  The Viper does have a plastic end-cap which looks to my uneducated eyes is if it would fit.  If not, I'll attempt to purchase a 440 end-cap or suitable replacement prior to him being allowed to use it.
Bob


Offline CO_AirGunner

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Just to clear it up, the end cap must be the type that slides OVER the end of the receiver, and covers the pin.  The one from the Whisper just sticks onto the end instead and won't do anything for the pin.
\"Engineers don\'t idle well.\"

If guns get outlawed, only the outlaws will have guns. You don\'t want that, do you?

Offline RedFeather

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You might, alternately, put a flat-headed pin on the insides of the stock channel, or something similar, to shim the stock inward.  Then your cross-pin no longer has the room to shift.

Offline Bob Fairchild

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New Old Guy here (first blog, thread) ever.  Excellent description and picture of the problem.  I too have a Whisper (with ram air, GRTIII, etc.) and also have issues with the stock.  I can't get close to  a 'spot weld' and don't like the chin weld I am forced to use.  I am thinking of another approach.  This may not be the forum for this but, if you are finished with your Whisper synthetic stock, I would be interested in it to try to cut it up and make an adjustable cheek piece.  I find I like the sythetic and plan the spray foam approach.  The 440 stock you have used is excellent and I might get interested in that way to solve my problems.  Thanks for sharing your info and I look forward to following your build.

Offline RedFeather

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Someone did that with a CFX.  They cut out the comb, installed some pillars and made it adjustable.  You can also try a strap-on pad.

Offline airiscool

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"Someone did that with a CFX. They cut out the comb, installed some pillars and made it adjustable. You can also try a strap-on pad."

Or as I do with my shotguns - buy packs of the adheasive backed velcro strips from fabrics stores. Get a scrap of leather big enough to cover the comb.  Stick the loop side on the top of the stock and sides of the stock where the pad edges will be.

Stick the hook side inside the middle and edges of a piece of leather,  cut the leather to the shape of the comb, or whatever shape works for you.

Put some more  strips back-to-back together so there is a hook side and a loop side on each.

Stack the extras as high as needed on top of the stock, and then put the leather cover over all.  

Adjustable comb, all for under $5.00.

Paul.
Benji Trail NPXL 1100, Gamo .22 Whisper, Crosman 760 Pumpmaster, Crosman 66 Powermaster, Crosman .22 revolver, Daisy model 102, Daisy early Model 25.

Offline dnttech

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Hi Jared...I just went to Gamo's website and looked at an exploded diagram of the 440/Whisper/Viper.  It appears the Wihisper uses a different end cap and cross pin part number then either the 440 or Viper...those 2 models share the same part numbers for both parts.  I believe the only problem I'm going to have in converting the Viper to the wood stock may possibly be in the cocking linkage, I believe there was some discussion about this item awhile back...I'll have to check previous posts/archives to see if a solution was found.
Bob


Offline CO_AirGunner

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Bob,
I assume you are talking about the diagrams on Gamo's Spain website? (Here: http://www.gamo.com/portal/es/documentacion )

What is interesting on those is that the Whisper and Hunter 440 listed there aren't exactly like the US models from what I can tell.  The end cap that they show for the Hunter 440 looks more like the one on my Whisper, and I need one like my father-in-law has on his 440.  I intend to give Gamo a call today.
\"Engineers don\'t idle well.\"

If guns get outlawed, only the outlaws will have guns. You don\'t want that, do you?

Offline dnttech

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Yes, Jared...the Spain website...sorry, I forgot to mention that.  It'd be interesting to see what Gamo says.  Looking at the Viper on their site, it appears to be just another Whisper with a Viper stock.
Bob


Offline CO_AirGunner

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Gamo completely blew me off.  Apparently they don't sell any parts other than what is listed on their website to the general public.  You have to either be an authorized Gamo dealer or a certified gunsmith for them to sell parts to you.  (hello - air rifles are NOT firearms...)  Unless I can find someone capable and willing to order this for me, it looks like I'll have to find or make something to use.

I haven't posted about it yet (and don't want to get into it here), but I have lost some love for Gamo here in the last week or so.
\"Engineers don\'t idle well.\"

If guns get outlawed, only the outlaws will have guns. You don\'t want that, do you?

Offline CO_AirGunner

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First off, from one newbie to another, welcome to the forum!!!

Until I can find a remedy for the pin situation, I have switched back to the synthetic stock.  Drop me a message after I am able to switch back the the wood stock and we can figure something out.
\"Engineers don\'t idle well.\"

If guns get outlawed, only the outlaws will have guns. You don\'t want that, do you?

Offline derekmcminn

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What are you planning to do with the synthetic Whisper stock
now that you switched to wood?

Wanna sell it?
\"My favorite airgun is the one I\'m buying next..\"

Offline CO_AirGunner

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See my post above to Bob Fairchild.
\"Engineers don\'t idle well.\"

If guns get outlawed, only the outlaws will have guns. You don\'t want that, do you?

Offline derekmcminn

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Sorry, I must have missed that post.


I have a Hunter 440 and I've always wondered what it would feel
like with a synthetic stock.
\"My favorite airgun is the one I\'m buying next..\"