I read that the Edgun Leshiy Extended Baffle V2 well tighten up groups with foam added but that was just from what I read on donnfly reviews from customers
I have the DonnyFl V2 extended baffle, the STO insert & the stock moderator.
I have not noticed a difference in groups between the STO & DonnyFl. I have barely shot through the stock moderator.
The STO is the lightest & quieter but I do like having the DonnyFl extended baffle for when I want to rubber band my FX Radar to the end & still be able to fold the Leshiy completely. That's a quick switch & I'm glad to have the DonnyFl for that reason alone.
Mine also came with the Stephen Brown laminated grip. I think it looks fantastic on the gun & feels comfortable at first but my hand does cramp up after a while. I had a friend 3d print an AR style grip for it & that seems a bit small for me but a good compromise when shooting with my boys.
I think I've heard there are two versions of the SB grip that fit a bit differently. I might try to modify mine slightly.
There is an over seas company that makes a small extension for the stock grip that looks interesting.
My Rugged Ridge bipod (also came with the gun) works on the Leshiy when mouned as far back as possible & the folding/safety function still works. But I didn't care for it that far back & now have it well forward on a Lion Gear picatinny extension & a small UTG riser.
If you prefer a bipod that mounts on the stock picatinny rail without adapters then research carefully. Especially how & where the legs fold up for storage.
I have tried a 3-12 Bugbuster on my Leshiy & it just wasn't for me.
Also have a Dedal. I could probably use a bit more eye relief & magnification but my only real complaint about it is that it sits just a fraction high for me. But I love the field of view & being able to scan the trees with both eyes open. The top parallax is very convenient.
I do wish the stock had a bit more drop at the shoulder. That can be accomplished with the Drozd air tube extension or with the extension piece from Carm. I haven't tried either as the shoulder fit is not a major concern.