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Max Online: 16728 @ 03/25/12 08:51 AM
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#6333109 - 06/12/16 11:12 PM AR assembly issue
Blanco Online   content
Tracker

Registered: 12/29/10
Posts: 792
Loc: Ft.Worth
I have a polymer lower on my AR M4 style. I think it is a 4 position?
Anyhow, my son got me an early fathers day present. A Magpul MOE stock for my AR.
The Magpul must use a smooth buffer tube So I ordered a new metal one from Amazon.
I got everything back together .... However the original tube had a notch for a buffer weight keeper.
The new tube is shorter in the threaded area and has no notch for the keeper.
Now there is nothing to contain and compress the buffer spring.
What do I need ?
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#6333115 - 06/12/16 11:17 PM Re: AR assembly issue [Re: Blanco]
Toxarch Online   content
Pro Tracker

Registered: 03/09/11
Posts: 1684
Loc: Parker County
You don't have to have the notch. Just tighten the tube far enough to hold the keeper in place and then tighten the castle nut over the lock ring.
If the threads are too short to hold the keeper in place, then return the buffer tube and get a different one.
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It is far more important to be able to hit the target than it is to haggle over who makes a weapon or who pulls a trigger.

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#6333121 - 06/12/16 11:28 PM Re: AR assembly issue [Re: Blanco]
Blanco Online   content
Tracker

Registered: 12/29/10
Posts: 792
Loc: Ft.Worth
The tube has a boss behind the threaded section. It threads on until it bottoms against the boss. Still has about 1/8 inch to go before it would hold the keeper in place.
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#6333125 - 06/12/16 11:32 PM Re: AR assembly issue [Re: Blanco]
Toxarch Online   content
Pro Tracker

Registered: 03/09/11
Posts: 1684
Loc: Parker County
Then I would contact Amazon and send it back.
_________________________
It is far more important to be able to hit the target than it is to haggle over who makes a weapon or who pulls a trigger.

— Dwight D. Eisenhower

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#6333168 - 06/13/16 05:12 AM Re: AR assembly issue [Re: Blanco]
TexFlip Offline
THF Trophy Hunter

Registered: 08/18/12
Posts: 8665
Loc: Harris County
Post some pictures or link to buffer tube from amazon. The delta ring and end plate should be adjustable by loosening the castle nut and then tightening it after the tube is in place. Perhaps he bought an airsoft tube by mistake.
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#6333287 - 06/13/16 08:20 AM Re: AR assembly issue [Re: Blanco]
jeepercreeper Online   content
Extreme Tracker

Registered: 11/07/10
Posts: 3651
Loc: DFW
Probably airsoft if found on Amazon

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#6333385 - 06/13/16 09:45 AM Re: AR assembly issue [Re: Blanco]
KRoyal Online   sleepy
THF Celebrity

Registered: 01/24/07
Posts: 13638
Loc: Sherman/North of Dallas
Possibly airsoft tube or pistol tube. Please post some pictures.
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#6333446 - 06/13/16 10:32 AM Re: AR assembly issue [Re: Blanco]
Toxarch Online   content
Pro Tracker

Registered: 03/09/11
Posts: 1684
Loc: Parker County
Oh yeah, forgot about the airsoft parts. I really wish Amazon would require sellers to clearly post whether they are selling airsoft parts or not. I usually read through the Q&A section and the reviews to figure out if it's an airsoft part or not before buying.
_________________________
It is far more important to be able to hit the target than it is to haggle over who makes a weapon or who pulls a trigger.

— Dwight D. Eisenhower

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#6333456 - 06/13/16 10:39 AM Re: AR assembly issue [Re: Blanco]
Bradgrace Offline
Bird Dog

Registered: 06/11/11
Posts: 265
Loc: Greenville, Tx
I've got a pistol buffer tube that you don't use a castle nut on. Try to post a picture of it.

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#6333584 - 06/13/16 12:04 PM Re: AR assembly issue [Re: Blanco]
Blanco Online   content
Tracker

Registered: 12/29/10
Posts: 792
Loc: Ft.Worth
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#6333602 - 06/13/16 12:19 PM Re: AR assembly issue [Re: Bradgrace]
KRoyal Online   sleepy
THF Celebrity

Registered: 01/24/07
Posts: 13638
Loc: Sherman/North of Dallas
That is an A2 "rifle" buffer tube it's for fixed stocks only. You need a carbine buffer tube. There are 2 different types as well a commercial and milspec depending on what stock you have will determine which buffer tube you need. If it's a 4 position colt CAR type stock you'll most likely need the milspec tube.
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#6333604 - 06/13/16 12:20 PM Re: AR assembly issue [Re: Blanco]
JESmith Offline


Registered: 03/03/09
Posts: 460
Loc: Allen, TX
That's an A2 rifle length tube for a non-adjustable rifle stock. You will need a rifle spring and rifle buffer to go with it. You just thread it on until it almost touches the keeper.

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#6333730 - 06/13/16 02:15 PM Re: AR assembly issue [Re: Blanco]
okstatefan Offline
Tracker

Registered: 01/26/13
Posts: 814
Loc: Forney, TX
Something like this is probably what you are looking for...

http://www.deltateamtactical.com/Mil-Spec-Buffer-Tube-Kit--Heavy-Duty_p_3582.html

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