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AR Pistol Double Feeding - Gas Block or Buffer Mod?

Mark K

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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

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