What size buffer for 16.5" barrel?

[Power Pill]

I took my AR to the range today and i noticed the sometimes the bolt wouldn't hold back after the last shot.....at first i thought maybe the mag was no good or maybe the gas block and has port are lined up great...but then i got thinking...I use to have a 20" barrel on it and i didn't put a carbine buffer in when i switched barrels..


do you need a carbine buffer or a rifle buffer in a 16.5"?


thanks

 

[zykopat]

I'd check the mags... If you get the chance, try 'em on another AR.
If you switched to a shorter barrel you should have more gas pressure delivered to the bolt carrier, anyway if your AR was short stroking, it would do it before you get to the last round.

btw, to the best of my knowledge, type of buffer/spring is related to the type of stock, not the barrel length. (well you have several carbine buffers - different weights, but only one type of rifle buffer)

 

[Rebel Rouser]

C7A2 run H buffers.

 

[Power Pill]

I'd check the mags... If you get the chance, try 'em on another AR.
If you switched to a shorter barrel you should have more gas pressure delivered to the bolt carrier, anyway if your AR was short stroking, it would do it before you get to the last round.

btw, to the best of my knowledge, type of buffer/spring is related to the type of stock, not the barrel length. (well you have several carbine buffers - different weights, but only one type of rifle buffer)

oh ok, good to know. thanks

 

[RaTa]

I'd bet money on it being the mags. If not then I would check the gas block. Further to the gas block would be the port size on the barrel which would depend on who made the barrel.

 

[Power Pill]

I'd bet money on it being the mags. If not then I would check the gas block. Further to the gas block would be the port size on the barrel which would depend on who made the barrel.

looks like its the mag.

the barrel is made by YHM, put together by Dlask.

 

[RaTa]

Yea check it with new mags first if its still a problem send it back to Dlask. He builds a lot of ARs I'm sure he knows what he's doing.

 

[Petrock]

Find some other AR shooters on the line and ask politely to borrow a mag for a function test. I'm pretty sure that would be the least expensive and time consuming method. If you run into someone that tells you "no" to borrowing a mag for a couple minutes, I'd be surprised.

 

[Leg]

C7A2 run H buffers.

Actually they're H2 buffers. Apparently they found it to be the most reliable buffer when using multiple uppers with different barrel lengths.

To the OP, if you left the full length buttstock on your rifle then you should leave the rifle buffer in there. Carbine buffers are only to be used with the shorter buffer tube used with collapsible stocks. Sounds like you've figured out your problem though.