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Posted: 5/3/2026 4:46:43 PM EDT
[Last Edit: RacingOrange][Edited]
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The Strike brace that came with it digs into my shoulder making it very uncomfortable to shoot. The gun itself shoots great. I'll just SBR it and put a stock on it. What stocks should I consider? I have a PA 3x microprism on it so want something that won't interfere with being in the right eye relief range. Also, feel free to suggest other upgrades that I should add to the Kuna |
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Originally Posted By sparky-kb: I'm going with the UCS on a HB Industries aluminum hinge adapter once my stamp comes back (and HB Industries gets them back in stock). Looks like it needs a cheek riser to get a proper cheek weld with how low it is vs the rail on the Kuna. Maybe I'm just overthinking. I had HB stuff on a Scorpion and enjoyed it |
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Originally Posted By willi3d: Can’t go wrong with the factory stock. https://imagizer.imageshack.com/v2/xq70/921/yz49hF.jpg +100 I’ve been through the Vector, UBR, and factory HS-P stocks. Factory is definitely the best. |
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The opinions expressed here are my own and do not necessarily reflect the views of my current or former employers.
Joined:
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Originally Posted By Headspacer: Besides LOP, how high/ low are you mounting your red dot? Do you care about utilizing the factory flip up sights? Just some considerations. These 2 are kinda opposite ends of the spectrum. l] Again, I have a PA 3x microprism on it. Don't care about the irons. I care about eye relief & cheek weld & comfort as far as the butt pad goes aka if the butt pad is not rubber, I'm not buying it. |
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Originally Posted By sparky-kb: I'm going with the UCS on a HB Industries aluminum hinge adapter once my stamp comes back (and HB Industries gets them back in stock). https://i.imgur.com/IMUU3hd.jpeg https://i.imgur.com/xIte1C6.jpeg Needs to fold left. I hate right folders. |
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Originally Posted By d16man: Needs to fold left. I hate right folders. It can be set up to fold either way. I hate left folders though. I don't like the stock on the side that's up against my body when it's slung. I prefer to keep that side as slick as possible. OP, I believe the UCS comes with cheek risers as well. |
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Originally Posted By willi3d: It comes with two snap on cheek risers. https://imagizer.imageshack.com/v2/xq70/922/FHoLS0.jpg https://imagizer.imageshack.com/v2/xq70/923/8IcbNW.jpg Thanks. That's what I thought. Wasn't sure if they came with it or if you had to buy them separately and I was too tired to Google it 
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Originally Posted By RacingOrange: Ordered the HBI UCS stock. I'll put it on once my form 1 is approved. I might also slap a UCS stock on my Ruger Charger Sweet. Thanks for the heads up that they are back in stock also. I was on the wait list but never got an email  Got one headed my way along with the reduced weight selector spring. |
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| I also ordered a B5 stock. Either I will like both & HBI stays on Kuna & B5 stays on Ruger Charger or I prefer the B5 and sell the UCS for another B5. I only say that because my concern w/the UCS is I won't be able to comfortably be within the right eye reliefer range for the PA 3x microprism. We shall see! |
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Originally Posted By RacingOrange: I also ordered a B5 stock. Either I will like both & HBI stays on Kuna & B5 stays on Ruger Charger or I prefer the B5 and sell the UCS for another B5. I only say that because my concern w/the UCS is I won't be able to comfortably be within the right eye reliefer range for the PA 3x microprism. We shall see! If you’re talking about the B5 MPS stock, I don’t think you’ll get a shorter LOP than the HBI UCS stock. While the MPS is shorter, it’s only set up for a 1913 pic rail mount, so using the Kuna pic rail rear adapter will add a little length. The HBI modified UCS stock has an integrated direct adapter that replaces the pic rail rear, so it’s shorter compared to a standard UCS on a rear pic rail. I did a comparison review of the two stocks, although it’s the standard pic rail mount version of the UCS. https://www.ar15.com/forums/Armory/Kuna-Magpul-UCS-vs-B5-MPS/48-558260/ |
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Originally Posted By willi3d: If you’re talking about the B5 MPS stock, I don’t think you’ll get a shorter LOP than the HBI UCS stock. While the MPS is shorter, it’s only set up for a 1913 pic rail mount, so using the Kuna pic rail rear adapter will add a little length. The HBI modified UCS stock has an integrated direct adapter that replaces the pic rail rear, so it’s shorter compared to a standard UCS on a rear pic rail. I did a comparison review of the two stocks, although it’s the standard pic rail mount version of the UCS. https://www.ar15.com/forums/Armory/Kuna-Magpul-UCS-vs-B5-MPS/48-558260/ Nice, thank you. It would be great it the UCS on the Kuna works for me & the B5 on the Charger. I would prefer to not play stock roulette ;) |
| Can anyone explain why most of the braces and stocks on the Kuna fold to right? I have an SBT (CZ) on mine, and it blocks the ejection port when it’s folded so that it will not function. It’s not a huge deal, but just seems kind of silly when it seems like to could just as easily be designed to fold to the left and allow the gun to work when folded. |
| I’ve notice most European SMG stocks seem to fold to the right (B&T, HK, CZ, Kuna, Stribog, etc.). I assume it’s because they are commonly carried on the right side of the body and this arrangement allows people to easily unfold it with the right hand and without having to move it away from the body first for clearance. It also seems that most factory stocks are designed to not cover the port when used on the gun were made for. Braces are usually designed to mimic popular stock designs for looks, but people put them on guns that the stock wasn’t designed for and end up complaining that the port gets blocked. |
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Originally Posted By willi3d: If you’re talking about the B5 MPS stock, I don’t think you’ll get a shorter LOP than the HBI UCS stock. While the MPS is shorter, it’s only set up for a 1913 pic rail mount, so using the Kuna pic rail rear adapter will add a little length. The HBI modified UCS stock has an integrated direct adapter that replaces the pic rail rear, so it’s shorter compared to a standard UCS on a rear pic rail. I did a comparison review of the two stocks, although it’s the standard pic rail mount version of the UCS. https://www.ar15.com/forums/Armory/Kuna-Magpul-UCS-vs-B5-MPS/48-558260/ I have the B5 waiting to go on my 10/22 Charger once that form 1 is approved. |
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