i think that i will take the TM M4 Carbine SOCOM.
i heard that is it the SOPMOD Version, but not with the rails on the handguard.
Do you can please to give me some links,
to the parts that i need to upgrade for the 120M Spring.
but give me a good parts, that good to the SOCOM(/ SOPMOD).
one more question - is the 120M Spring can down the blowback shock, or make him more higher?
Thank you very much!