I'm hoping to absorb some technical information from people much more educated about the AR platform than myself. Let me preface my question with the following
- All of my rifles are suppressor ready or have direct thread suppressors on them (with rockset)
- I'm already using the A5 buffer system + sprinco springs
- I'm using LMT enhanced carriers in most rifles
- Most rifles have an adjustable gas block
- For the above rifles, I have a 16" Mid length BA Barrel, a 14.5" Mid Length BCM ELW Barrel, and a 11.5" Carbine Length Sionics Reduced Gas port barrel
Given the above, I still get a decent amount of gas to the face compared to unsuppressed guns, albeit minimized by taking the above steps.
For the following, please correct any misinformation/assumptions that I'm about to list; I'm just trying to learn here. Anyway, I was thinking about gas port placement/size + guns that are permanently suppressed. From my understanding about gas hitting your face, it is a combination of excess gas coming from the gas tube, as well as back-pressure coming from the chamber. Adjustable gas blocks help with the former, but do less to help the latter. This seems to be because the suppressor is keeping chamber pressure higher, longer, but not high enough to cause extraction/ejection malfunctions.
Questions
- Given one has a permanently attached suppressor, wouldn't it make sense to shorten the length between the gas port and the end of the barrel? E.g. a 12.5" or 13.5" mid length barrel would delay the bolt/bolt carrier unlock further compared to say a 12.5" or 13.5" carbine barrel?
- If a 12.5" mid length barrel was on the edge of being under gassed due to lack of dwell time, wouldn't adding a suppressor help?
- Am I wrong to think that if you add a suppressor to a perfectly functioning gun, you've increased dwell time and its likely no longer perfectly functioning (albeit, probably still functions fine)?
- If the above are true, why doesn't anyone offer these types of barrels? The closest thing I've ever seen is maybe the Faxxon 11.5" mid-length barrel. It seems the only other way you'd get this type of barrel is to cut a 16" barrel down.
- Isn't the A5 system and heavier buffers sort of accomplishing the same thing by delaying bolt/carrier unlock thus working to reduce back pressure to your face?
What I'm kinda getting at is that it seems a shorter distance between the gas port and the end of your barrel would allow chamber pressure to drop further than a longer length system and thus reduce gas to your face. E.g. a 11.5" pistol length barrel would in theory spew more back pressure gas in your face compared to an 11.5" mid-length barrel assuming they are both functioning reliable/both have adjustable gas blocks. Thoughts?
Bookmarks