AR Pistol Double Feeding - Gas Block or Buffer Mod?

[Mark K]

Just finished building an AR pistol in .223 (also have a 300BLK upper 1/2 way done). The .223 upper is a 10.5" barrel. Carbine length gas tube (low profile gas block). Pistol buffer tube basically has a carbine buffer in it that weighs 82gm.

Test fired it today, and it would shoot 2-4 shoots fine, and then either jam with an empty 1/2 way out, or have a double feed. I feel like the BCG is cycling too fast.

Should I make the buffer heavier (can only make it a little heavier by filling with melted lead), or try and find an adjustable gas block?

Thoughts? Experiences?

Mark K

[EkuJustice]

spikes h2 buffer will slow it down and smooth it back

[Mark K]

spikes h2 buffer will slow it down and smooth it back

Thanks, Like everything else AR, they are no where to be had.

Mark K.

[RWF]

the flaming pig is made just for short barreled ARs but they increase pressure for relieabliy.

Noveske=flaming pig

[Brine0]

Not enough gas

Edited August 8, 2013 by Brine0

[ThomasM]

Not enough gas

THIS ^^^^^

If your bolt isn't coming back far enough to throw the empty out you don't want a heavier buffer. You need more gas to push that bolt back and cycle the empty out.

[Brine0]

Exactly

Try a adjustable gas block after opening up the gas port in the barrel.

Edited August 8, 2013 by Brine0