Yours appears to be the SL-K? which works on a standard carbine receicpver extension?
Then there's a shorter SL-M that requires a dedicated shorter receiver extension (and presumably buffer and spring?)?
anyone know if the M will work on a folder?
I have a spare “ultralight” SBR that wouldn't be so light with all this junk in the trunk but might be useful if it were compactable…
SL-K VS SL-M