[Kungpow]

Lancer Tactical MMC/BO-Dynamics/Lonex BAW-R (Looks like it kicks as much as a KJW M4)

GBLS DAS M4A1 (Real Bolt Lock and Release...Expensive)

Bolt M4 Heavy Recoil Version (Higher kick than regular Bolt M4 models)

Bolt M4 (Good Kick on par with the KWA ERG. No bolt lock/release)

Bolt MP5J/MB5 B.R.S.S (Good Kick, apparently highest kick?)

KWA ERG (Good Kick on par with the Bolt M4. Simulated Bolt Lock/Release)

TM EBB rifles (Low recoil?) (Simulated Bolt Lock/Release)

TOP M4A1 EBBR Shell Eject (Low recoil?) (Real Bolt Lock and Release)

G&P Free Float Recoil System M4 (Petty recoil with no bolt lock/release...seriously where is the recoil?)