AR 10 Timing and overpressure

[Not_A_Llama]

Preface: Some say the plural of ?anecdote? is not ?data?.

The high pressure bolt with small firing pin hole is the answer to the otherwise disconcerting primer pressure signs you?ll see. I accept that a small degree of ejector swipe is expected.

The adjustable gas block is required on large frame ARs, in my opinion. Troubleshooting is not super straightforward, though, and overgassed can look like undergassed. Play with it a bit if you?re not getting desired operation off the bat.

Edit: AGB can help with ejector swipe. It will do nothing for primer signs.