[stipsniper.com]

Hi, just a query on behalf of a few of us...

Is the LRB mod still relevant in 2022 with all the other parts we have available now compared to ten years ago? I see a few posts with them on. Just wondering if they still have any noticeable effect.

Cheers

Stip

 

[SiliconeSword]

I made one for my VSR-SS, a gun that was mostly homemade that I ended up quitting on and parting out due to how it looked towards the end.

Anyways, it had a LRB built into the suppressor adapter that was able to rotate 360°, and it did absolutely nothing. I think that maybe it would work better for a barrel with a wider bore diameter than mine, but from my understanding, BBs stay pretty well centered in a barrel even if it curves, so I don't think there's significant air currents to add backspin or something. I'm still trying to figure out hop and barrel stuff, and pin down exactly what does what, so I'm not completely decided on anything right now.

 

[redmoon3580]

I played a lot with LRBs with AEGs back in the day. As in back when .30g goldenballs were considered good bbs, and when the only .4g bbs were colored madbulls that were unusably inconsistent.

I found that LRBs helped with range, but not so much accuracy.

My explanation was that by having the barrel angled down, you needed to apply more hop. Having more hop delayed the 'reverse magnus effect'. Of course, I found myself using angles a bit more dramatic than typically described online. When determining what angle I wanted to bend a barrel for an AEG, I'd bench it and shoot from that angle. Adjust the angle and hop a few times until I was happy with it. Then I'd bend the barrel to that approximate angle.

Now days we have access to much heavier and more consistent BBs. I played with angled benched firing a bit using BLS .45s and didn't see much improvement. It could be that the additional momentum of the heavier BBs keeps spin decay at bay enough that reverse mangus effect isn't as important. After all, if you can float a BB out far enough that it can't be felt, why bother getting it to go further?

 

[1tonne]

My explanation was that by having the barrel angled down, you needed to apply more hop. Having more hop delayed the 'reverse magnus effect'. Of course, I found myself using angles a bit more dramatic than typically described online. When determining what angle I wanted to bend a barrel for an AEG, I'd bench it and shoot from that angle. Adjust the angle and hop a few times until I was happy with it. Then I'd bend the barrel to that approximate angle.

I am pretty sure that LRB's do the opposite. With the curve along the top of the barrel, the bb is meant to ride along the top causing the bb to roll backwards. Thus, since the barrel is already causing backspin, you then did not need so much hopup.
LRB's do work but as mentioned, they can be a pain in the backside to set up. Also, a lot of the time, you do not need them. They are good if you have a low energy rate but you are wanting to fling an extra heavy bb a long way. At low energy rates, it can be hard to get enough backspin and so a LRB will help give that little bit more backspin.

 

[SiliconeSword]

I either rock .30g at 1.7J, or .40g at like 2J, or .48g at about 2.9J, so I don't think that my LRB would have been able to do much by the sounds of things.

I don't deal with low power since I don't live in Japan, Ireland, or Italy, so I don't think it matters much.