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  #1  
Old 11-08-2020, 09:39 PM
tomky tomky is online now
 
Join Date: Oct 2009
Location: Owensboro, KY
Posts: 396
Default Trouble with handguard

My carbine's handguard will pop up after just a few rounds. I built up the carbine from a barreled receiver from the CMP years ago. The stock is a DGR. I have tried tightening the band screw and traded handguards... I wonder if the barrel band might be culprit, it may be a little out of square and is loose on the barrel itself. Does anyone know of a fix?
I was wondering if the ventilated metal handguards might be a remedy, anyone with experience with those?
Any thoughts would be appreciated. Thx
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  #2  
Old 11-08-2020, 10:21 PM
GotSnlB28 GotSnlB28 is offline
 
Join Date: Oct 2010
Location: WI
Posts: 1,379
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One of mine had a problem with the band slipping off the band spring, I replaced the spring and it was fine. Its probably that unless the guard lip isn't fitting under the barrel band properly.
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  #3  
Old 11-09-2020, 09:20 AM
309Carbine 309Carbine is offline
 
Join Date: Feb 2017
Location: South Mississippi
Posts: 410
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In my experience, the commercial metal guards usually run a bit longer than GI guards. You can also bend the lip to gain a more positive contact with the band. I am not a big fan of the metal guards, just an option. Most wooden commercial guards also run a little longer. Make sure the nose of the band-spring is engaging the band notch properly. If it’s not seated, the band can move forward under fire.

Don’t pay $20 plus shipping for a ventilated steel guard.....think I have one in my stash.
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  #4  
Old 11-09-2020, 10:27 AM
tomky tomky is online now
 
Join Date: Oct 2009
Location: Owensboro, KY
Posts: 396
Default So far still no luck

I did try a new spring (not GI) and again hg popped off.
Roger, let me know what you would like for the metal hg and I will try that.
If that doesn't work I may try replacing the barrel band.
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  #5  
Old 11-09-2020, 10:42 AM
309Carbine 309Carbine is offline
 
Join Date: Feb 2017
Location: South Mississippi
Posts: 410
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PM on the way. Canít guarantee it will work, but I have one for you to try.

I sent you another PM with a deal you might canít refuse...LOL.
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  #6  
Old 11-09-2020, 02:10 PM
tomky tomky is online now
 
Join Date: Oct 2009
Location: Owensboro, KY
Posts: 396
Default PM responded to

Thanks Roger, that's a great deal
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  #7  
Old 11-09-2020, 09:05 PM
GotSnlB28 GotSnlB28 is offline
 
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Location: WI
Posts: 1,379
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On the band spring: here's a picture with a (presumed aftermarket) problematic spring on the right, and a USGI spring on the left. The USGI spring has a sharp edge while the aftermarket does not.

https://imgur.com/a/BJC2Gli
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  #8  
Old 11-09-2020, 09:34 PM
03man 03man is offline
 
Join Date: Feb 2015
Location: near Charlotte NC
Posts: 148
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The band retainer is the likely suspect.

It is easy enough to put a sharp edge on a repro band, or help out a worn original,
just use a needle file and square it off.

Use a safe edge V file if you have one, and put a little reverse angle on it too- like a slight fish hook barb.
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  #9  
Old 11-10-2020, 12:56 PM
tomky tomky is online now
 
Join Date: Oct 2009
Location: Owensboro, KY
Posts: 396
Default I agree on band retainer spring

I did notice the difference between GI and repro springs and I have tried filing the repro to square it up. Thanks.
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  #10  
Old 11-10-2020, 02:05 PM
mycanoe44 mycanoe44 is offline
 
Join Date: Feb 2016
Location: Southern MN, Owatonna
Posts: 364
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On my "shooter" Std Prod carbine, I had to file the fish hook on the spring and add a couple washers under the clamp screw so it would clamp tighter and keep the hand guard from popping off.
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