Need help knowing if my ar9 upper will be compatible with the sl9

Tony___

I need helping knowing if my 4"
Complete 9mm AR-15 Upper for Glock Style Receivers - Blast
Diffuser from foxtrot mike will fit on the sl9 I don’t wanna buy it just for it to not fit

undeadchew

Tony___
I just put one of my FM9 Uppers on an SL9 lower and they snugly fit together.

Tony___

undeadchew what upper are you using?

undeadchew

Tony___ This is the foxtrot mike 9mm upper like I thought you were asking about.
Anything off this page will work.
https://store.fm-products.com/catalog/mike-9/uppers
or if this I believe will also fit,
https://www.primaryarms.com/foxtrot-mike-products-4in-complete-9mm-ar-15-upper-for-glock-style-receivers-blast-diffuser

gnilreib

Any know if the BCA AR9 uppers fit?

hoffmantactical

gnilreib Their AR-15 uppers will, so as long as the AR-9 uppers are a similar profile, they should be good to go.

PRNTY

gnilreib The bufferless uppers will not but the standard ones should

gnilreib

Thanks for the replies. I can confirm they (not bufferless) do fit, since I just got one 😉

If anyone is interested, it came with a buffer which weighs 5.64 oz. The BCG weighs 15.16 oz. At 21 oz combined, it's a little underweight but I haven't shot it yet. I also have a 11oz KAK buffer to try.

The BCA buffer feels like a solid chunk of steel with no sliding weights inside (I'll probably take it apart to double check) while the KAK buffer looks and feels nice with sliding weights. The KAK is also slightly longer, 101.5mm vs 100mm.