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  #1  
Old 01-24-2021, 10:42 PM
krdomingue krdomingue is offline
 
Join Date: Nov 2015
Location: Katy, TX
Posts: 1,471
Default Barreled Receiver will not pass tilt test

Looking for advice before I give up and part it out.

I purchased an HRA barrel receiver in Feb 2016 from somebody on this form who had purchased it from the CMP years prior. It sat around for a while before I collected all the parts to put it together. After I finally got around to it, it will not pass the tilt test with the lower band installed. I have tried with a couple different lower bands including a brand new one off a CMP stock set. I have tried several different op-rods to include a couple off perfectly functioning rifles. I have also tried it will three different gas cylinders.

No lower band, it passes the tilt test. With lower band it fails.

I am hoping I am missing something obvious, but I am beginning to believe the barrel might be slightly bent.

Suggestions?

Last edited by krdomingue; 01-25-2021 at 02:00 PM.
  #2  
Old 01-24-2021, 10:45 PM
Jakeroub Jakeroub is offline
 
Join Date: Dec 2016
Location: Mass
Posts: 1,419
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Have you checked that the barrel is not over or under indexed?
  #3  
Old 01-24-2021, 10:48 PM
krdomingue krdomingue is offline
 
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Location: Katy, TX
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Quote:
Originally Posted by Jakeroub View Post
Have you checked that the barrel is not over or under indexed?
No, (and I will now) but it is rubbing against the bottom of band no the side.
  #4  
Old 01-25-2021, 12:50 AM
lapriester lapriester is offline
 
Join Date: Oct 2009
Location: Cobb, N California
Posts: 16,709
Exclamation

Bent barrel is really the only thing it could be. Find a wooden dowel that freely but barely fits into the bore. It should slide without resistance from the muzzle to the breech. If it binds along the way the barrel is bent. Or and much less likely, the barrel is cross threaded into the receiver somehow.
  #5  
Old 01-25-2021, 12:05 PM
ceresco ceresco is offline
 
Join Date: Oct 2009
Posts: 8,093
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Interesting situation.... a wooden dowel isn't exactly a precision gauge. I would be more comfortable with a selected rod from a Harbor Freight set of alignment rods if I didn't have the proper ordinance straightness gauge . Good Shooting. ...
  #6  
Old 01-25-2021, 12:32 PM
milprileb milprileb is offline
 
Join Date: Oct 2009
Location: Saigon, RVN
Posts: 3,126
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Well...try all your remedies but if nothing sorts out ...Chuck In Denver is who I'd contact and have him sort it out.

No offense but here you are and it could be something you are not trained to sort out. No shame in that
  #7  
Old 01-25-2021, 12:46 PM
krdomingue krdomingue is offline
 
Join Date: Nov 2015
Location: Katy, TX
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Quote:
Originally Posted by milprileb View Post
Well...try all your remedies but if nothing sorts out ...Chuck In Denver is who I'd contact and have him sort it out.

No offense but here you are and it could be something you are not trained to sort out. No shame in that

I have been through the Advance Maintenance Course and don't consider myself a complete novice, but I wouldn't be asking for advise if I thought I knew it all, so no offense taken.
  #8  
Old 01-25-2021, 01:45 PM
Vos Parate Vos Parate is offline
 
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Location: MO
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Have you tried a different operating rod?
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  #9  
Old 01-25-2021, 02:00 PM
krdomingue krdomingue is offline
 
Join Date: Nov 2015
Location: Katy, TX
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Quote:
Originally Posted by Vos Parate View Post
Have you tried a different operating rod?
Several.
  #10  
Old 01-25-2021, 02:49 PM
glindes glindes is online now
 
Join Date: Mar 2014
Location: DE
Posts: 480
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Is the rear handguard installed, that is, is the lower band on backwards for this test by any chance?
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