Question about KAC SR25 and LMT MWS lowers

I had a couple questions I was hoping to get some help on.

--Is the length of the receiver extension exactly the same for a stock KAC SR25 and LMT MWS lower?

--If I put an SR25 upper (CC 16") on a stock LMT MWS lower, will it run fine, or would I need to change out the buffer and buffer spring in the MWS lower?

Thanks

LMT and KAC are interchangeable.
They are literally sisters.

I dunno if the receiver extension is exactly the same but will work just fine

The receiver extensions are the same. Shouldn’t be any issues running a Knights upper on an LMT

Are both LMT/Knights Armalite pattern lowers?
If so, wouldn’t they mate to an Armalite lower?
Sorry for the dumb question...

Quote:

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Originally Posted by SFree

Are both LMT/Knights Armalite pattern lowers?
If so, wouldn’t they mate to an Armalite lower?
Sorry for the dumb question...

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No. They only mate amongst themselves. It is not recommended to try.
Notice how neither KAC nor LMT has a FA...

Thanks for the replies all. I thought I remember reading somewhere on here that the LMT MWS and KAC SR25 lowers come with different buffer weights (I think H3 vs H2). And I wasn't sure if there were differences in the default buffer springs either.