With this whole debate of an EBB AK.
My 2 cents. I have been researching this pretty hardcore for the past few days as I am after a recoil AK but not gas or HPA (been there done that cba anymore). I came to the conclusion and pulled the trigger on a TM NGRS Delta Storm AK.
LCT EBB. Externals are great. Internals are eh... Their EBB's aren't that great.
KWA EBB. Shit. Jams often. Poor internal QC. Watch USairsofts review
BOLT AK74. Amazing recoil. Very strong. Let down by very poor QC and the guns are prone to shaking themselves apart.
TM Recoil. It's a TM, they are tried and tested. Good stuff.
JG recoil. The recoil is pathetic. Nice and cheap though. Not much else to say.