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AR15.COM
1/27/2026 8:04:05 PM EDT
[Last Edit: kavants][Edited]
Any of you guys tried to install a Magpul PRS lite on a Larue LT-10? The stock is about 1/4" from the bottom. Magpul website says it should work on SR-25 type rifles.

ETA: I should have done more research I guess. It seems the LT 7.62 buffer tube is made longer.  The PRS Lite works on my 5.56 tAR. Oh well.

1/27/2026 10:22:56 PM EDT
[Last Edit: razARback][Edited] [#1]
It has been a while, but I think there is a kit you may need:

https://www.larue.com/products/7-62-adapter-kit/

Seems like they used to sell a rifle length receiver extension with an adapter that let you use the carbine spring and buffer from the UU kit, but again it's been a while.
1/27/2026 10:59:00 PM EDT
[Last Edit: kavants][Edited] [#2]
Quote History
Originally Posted By razARback:
It has been a while, but I think there is a kit you may need:

https://www.larue.com/products/7-62-adapter-kit/

Seems like they used to sell a rifle length receiver extension with an adapter that let you use the carbine spring and buffer from the UU kit, but again it's been a while.
View Quote


Yeah I found the kit you linked in the research I should have done ahead of time. It doesn't work with the PRS lite since its not compatible with rifle receiver extensions like the regujar PRS Gen 3. Not sure I want the PRS lite enough to replace the RE with a standard SR25 size.
1/28/2026 2:42:52 AM EDT
[#3]
I think this will get you the info wanted.

https://www.ar15.com/forums/industry/Adding-a-Magpul-PRS-to-a-Larue-AR10/219-301720/

Post #13
1/28/2026 8:56:03 AM EDT
[Last Edit: kavants][Edited] [#4]
Saw that post too. The spacer is different on the PRS lite due to the mechanism for the cheek riser. Took it all apart and its a no go.

Thank you for the suggestions. Looks like I'm out of options without replacing the extension.
1/28/2026 4:33:16 PM EDT
[#5]
I dont have one here. Can you post a picture of the rear spacer piece?
1/28/2026 6:39:37 PM EDT
[#6]
Quote History
Originally Posted By mettee:
I dont have one here. Can you post a picture of the rear spacer piece?
View Quote


I've already reassembled the stock. Its roll pinned in place and a bit of a pain to get apart. Ill try to get it back apart and post some pics.
1/28/2026 8:48:25 PM EDT
[Last Edit: kavants][Edited] [#7]
Hopefully these help.

Fully assembled.

Cheek riser removed and LOP loosened.

Disassembled.

"Spacer" removed from stock tube. This actually conatins the tension mechanism for the cheek riser. Can't be shortened.

There is a hard stop in the tube limiting the length of RE that can be used. Designed for only carbine type RE's not rifle type.
1/28/2026 10:07:57 PM EDT
[#8]
1/28/2026 10:21:01 PM EDT
[Last Edit: kavants][Edited] [#9]
Quote History


How about now?

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