300 Blkout paper Weight

[31Kwiredog]

So I bought a complete Anderson AR in 300blkout a while back. Was adding some new parts to it when I heard a rattling sound. So I broke it down and found the buffer detent spring and buffer detent inside the lower. The spring was bent. Bought new spring put it back together same thing happened again spring and buffer detent end up coming out when rifle is charged. Rifles never been fired.

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[31Kwiredog]

Can add pics if that would help.

 

[Stomper]

It sounds like you need to screw the buffer-tube inwards a bit more to catch more of the detent's shoulder, then torque the castle-nut down to ensure the buffer-tube doesn't drift back out from vibration.

 

[mjbskwim]

It sounds like you need to screw the buffer-tube inwards a bit more to catch more of the detent's shoulder, then torque the castle-nut down to ensure the buffer-tube doesn't drift back out from vibration.

Was gunna say.......

 

[v0lcom13sn0w]

x3. buffer tube needs tightened. guarentee someone up in your area will be able to help you out

 

[Kruel J]

Just like everyone else said. Loosen the castle nut and turn the buffer tube in a little more to catch the detent.

 

[Stomper]

Was gunna say.......

You WAS gunna say!!

 

[waglockfan]

Hopefully the buffer catch detent well is not damaged. You'd pretty much have to get a new lower, unless someone was good enough with a TIG welder and a mill to remake the hole

 

[31Kwiredog]

Thanks all going to give it a try..

 

[Flopsweat]

Thanks all going to give it a try..

Here's a good video on how to install a buffer tube. It will give you visuals on everything, and show you how to not bend your takedown detent spring if you undo the castle nut too far. It's easiest to undo the nut with a castle wrench but some strap wrenches will work too. A screwdriver will probably just scratch your gun up.

 

[31Kwiredog]

Thanks

 

[31Kwiredog]

Thanks to everyone for the help. Problem solved.

 

[Member 5605]

Thanks to everyone for the help. Problem solved.

Just remember when you take that buffer tube out later on to hold that detent pin in or it will be lost in the carpet. Lol. Don't ask me how I know.

 

[parallax]

Just remember when you take that buffer tube out later on to hold that detent pin in or it will be lost in the carpet. Lol. Don't ask me how I know.

been there done that…..

 

[Flopsweat]

Just remember when you take that buffer tube out later on to hold that detent pin in or it will be lost in the carpet. Lol. Don't ask me how I know.

I have a big clear plastic bag that I put the receiver in before I work on anything that can go "sproing". Open end of the bag goes down, reach inside the bag to do your work. Keep the spring loaded stuff pointed up, and anything that goes airborne hits the bag and drops softly on the bench.

 

[31Kwiredog]

Great idea..

 

[mjbskwim]

A better idea is tap that little spring hole and plug it
Then next time no worries