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Old 10-10-2017, 09:17 PM   #1
bunny
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Default 308 vs 223 rear retainer

What do I have to do in order to modify a 308 rear hg retainer to fit a 223 frame?
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Old 10-10-2017, 09:23 PM   #2
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The retainers hug the receiver and also fit around the barrel. You would need to correct the barrel portion thats missing. This can be done by cutting and adding in the metal.
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Old 10-11-2017, 07:30 PM   #3
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recs. are same width-barrel hole needs to be enlarged to fit over the barrel shoulder.
I have a cnc program to do mine with otherwise you need one BIG ass endmill/drill bit!
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Old 10-11-2017, 08:54 PM   #4
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Quote:
Originally Posted by bunny View Post
What do I have to do in order to modify a 308 rear hg retainer to fit a 223 frame?
Bad idea IMO.
308 retainers are oversized and won't fit around the chamber portion of the barrel. You would need to sleeve the barrel or the retainer, both a PITA. Better to just buy a .223 retainer instead of butchering up a 308.
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Old 10-12-2017, 11:26 AM   #5
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I think there are M78 hg retainers in a box of parts here. What is the barrels o.d. around the chamber?
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Old 10-13-2017, 12:38 PM   #6
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This fix is about as complicated as making breakfast.

Bunny do you have a decent welder?

Better yet can you weld?

If you have a old unusable barrel then use it as a guide.
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Old 10-13-2017, 01:48 PM   #7
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I have a machine shop a block away that can weld for a good price. I'm in an apartment so TIG/MIG welding is sort of out of the question.

308 retainer has the bipod handle attachment and 223 I've spent a year trying to find so I've resorted to this instead.
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