Small set screw fell out of my upper while cleaning and I have no idea where it goes
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Small set screw fell out of my upper while cleaning and I have no idea where it goes


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Old 11-22-2015, 03:28 PM   #1
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Default Small set screw fell out of my upper while cleaning and I have no idea where it goes

Hi, can anyone tell me where this screw goes? Thank you in advance!

Small set screw fell out of my upper while cleaning and I have no idea where it goes - AR-15 Discussion


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Old 11-22-2015, 03:35 PM   #2
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Is it a screw threaded? Couple more pics at different angles would help.


Sent from a phone I can use to do my taxes, but can't make a damn call.


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Old 11-22-2015, 03:59 PM   #3
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Looks like a bolt catch screw. What caliber is the upper?
Added--would be a plunger if not threaded.

Last edited by Mercator; 11-22-2015 at 04:03 PM.
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Old 11-22-2015, 04:32 PM   #4
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Thanks guys! The upper part is threaded like a set screw and the longer part seems to be just a stem. Its a DPMS .223/5.56. Thank you
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Old 11-22-2015, 04:49 PM   #5
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Do you have any optics or rail mounts it cold have come from?

If you can take another pic lay a coin next to it so we can estimate the size.

As stated above its shaped like a bolt catch plunger but never seen one threaded and of course that is in the lower rec.


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Old 11-22-2015, 05:58 PM   #6
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Quote:
Originally Posted by FrontierTCB View Post
Do you have any optics or rail mounts it cold have come from?

If you can take another pic lay a coin next to it so we can estimate the size.

As stated above its shaped like a bolt catch plunger but never seen one threaded and of course that is in the lower rec.


Sent from a phone I can use to do my taxes, but can't make a damn call.
DMPS uses a threaded bolt catch in a 308.
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Old 11-22-2015, 05:59 PM   #7
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what model dpms. dpms is known for using nonstandard parts. it could be anything. need a pic of the gun itself, good close ups of the lower and upper each side and exact model number
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Old 11-22-2015, 06:44 PM   #8
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Quote:
Originally Posted by Mercator View Post
DMPS uses a threaded bolt catch in a 308.
I'm aware. OP stated it was a 5.56. He also said he thought it fell out of the upper. Bolt catch is in lower.




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Old 11-22-2015, 08:04 PM   #9
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Looks like a buffer retainer to me, but having it screw in makes no sense.

EDIT: or this http://www.midwayusa.com/product/853507/dpms-rear-sight-base-index-screw-ar-15-a2-matte


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