Update, not a C anymore and to my surprise the piston is at the right position and it's a one piece barrel.
Downside : enormous wobble on the barrel. Fixed it by putting epoxy on the bottom of the barrel lock.
Just a few more mods and KV over
Heckler & Koch G36 Retractable stock (bought on RKSPlus)
Troy Battle Sights (not real ones)
Magpul RSA
Madbull Gemtech G5 silencer (QD)
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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)