Wait a bit on the SRC, we don't know what it's really worth right now.
Either take a WE Open Bolt (except for PDW and SCAR) or wait for the Open Bolt versions of the M4 line.
Other solution is the KJW M4 but after fixing some they are not really more reliable in the mid/long run than other brands and the NPAS is a bitch (compared to WA and WE ones) to adjust.
Tous les jours nous nous endormons plus instruits mais pas forcément moins bêtes...
I can do a CTRL+ATL+DEL on your gun !
Gun doc in Montreal on AEG, GBB, GBBR and Bolt rifle (gaz and spring)
Heavy custom builder (including painting)