Re: Buffer spring effect on accuracy???
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: KevinB-KAC</div><div class="ubbcode-body">Its a rotating locking bolt weapon, the bolt is not moved by recoil/pressure from the round*
It unlocks from the pressure of the gasses on the piston (yes the AR has a piston, its the tail of the bolt) that expand and push the carrier rearward, which in turn unlocks the bolt.
*Now when there is a suppressor attached, the additional backpressure will acton the casing and push the carrier rearward with greater speed.
</div></div>
I know this thread is really old, but I was over at Brownells doing the thing I do every time I'm done with an order (try to anticipate the part I'll want to buy next so I can buy it now instead), and I looked at the Tubb spring for the 3-4 time.
I decided to buy it and try it out later (like 1-2 months from now).
I did that because the tubb spring video (below) where the guy talks about the spring, suggests that the normal spring is getting weaker with every round, where the Tubb spring is not.
<span style="font-weight: bold">So at the very least, consistency over time and rounds fired is improved. </span>
They also mentioned how the bolt would stay locked longer due to increased pressure in the locked position, but would also cycle slower on rebound from fully rearward in the tube.
I've noticed a tendency of guys to single load rounds from slide lock when trouble shooting autoloaders. This tends to suggest that bolt rebound velocity is inconsistent and there may be minor differences in bolt attitude from round to round that contribute to accuracy problems. Or that people are paranoid and superstitious. One, the other or a combination of both.
For improved accuracy I was thinking that potentially the locking of the rifle could be more consistent round to round.
I also read a post of a guy who claimed his cases were 75% less dirty with the Tubb spring as opposed to the OEM. That suggested enhanced dwell.
<span style="font-weight: bold">At any rate due to the fact that David Tubb has for whatever reason not chosen to make any statements about the potential accuracy benefits of the product, I figured buying one would be the only way to know if it would help in my rifle. </span>
The guy in this thread who seems to show an improved accuracy from a $20 spring swap is interesting. Even 5% improved accuracy would be worth $22.
[video:youtube]
https://www.youtube.com/watch?v=lZQUYGbGmr4[/video]