Would a bayonet lug mounted bipod impact accuracy on AR15 ?

[Wanderling]

I don't want to replace the original handguard on my Sport II, nor do I want all that extra weight permanently attached. Was looking at some quick release bayonet lug mount bipod, but with it basically sitting on the barrel, would it impact accuracy / POI ?

 

[wally]

As a general rule anything resting on the barrel can affect accuracy (POI shift) and precision (group size) especially if the "loading" of the bag or bipod varies. But if you don't have a free-float hand guard you can probably live with it, as mounting it to the hand guard would essentially be the same as mounting it to the lug.

 

[Varminterror]

Weight hanging on the barrel and pre-load pressure pushing up on the barrel will effectively be the same whether it's rail mounted or lug mounted. Only way to fix that is free floating.

There are lots of mounts available for pic rails and bipod mounts for the hand guard. Nothing jumps out in my mind as utilizing the bayo mount.

 

[Art Eatman]

If the bipod is always mounted, and all shooting is done with use of the bipod, the sight-in will be constant. Any change in the pressure on the barrel will change the point of impact, e.g. offhand shooting or shooting with the bipod removed.

 

[CapnMac]

I have one, and it has never seemed to much change how things work.

Not that I've measured with a micrometer or the like.

At least from on the bench.

 

[Varminterror]

I'd expand on Art's conditions - not only does all shooting need to happen from the pod, all shooting would need to be done in the same position and on the same surface. It's difficult to get the same preload prone and benched, and very difficult to get consistent preload between a concrete bench and a truck tailgate and grass and a shooting mat with preload flap/strap.

Else you can and will pull of push your shots around.

 

[briansmithwins]

I don't want to replace the original handguard on my Sport II, nor do I want all that extra weight permanently attached. Was looking at some quick release bayonet lug mount bipod, but with it basically sitting on the barrel, would it impact accuracy / POI ?

1) Yes, it will.
2) Will it change POI enough to be noticeable? It depends.

If you're tying to shoot prairie dogs at 600 yards, a barrel mounted bipod isn't going to work well. If you're shooting cans at 50, you'll never notice the difference.

BSW

 

[Hardtarget]

Glad I saw this. I haven't put a bi-pod on my rifle because the same question was rattling around in my head. My set up puts me with the same problem. I have a 1913 gas block so my bi-pod would be mounted basically "on the barrel" . My free-float forearm would be of no help. Thanks. Y'all answered my question as well.

Mark

 

[jeepnik]

Most definitely. I put one on the lug of my Stag and noticed a rather significant and irregular POI shift. If you're free floated find one that attaches to the hand guard.