TM = crap internals
CA = crap internals
Replace with systema if anything breaks, 7mm G&P bearing are good, prometheus would be better but $$$/
"Silent" piston heads reduce impact force, therefore are very good to have and not actually very silent at all.
For high ROF, it's a good idea to lower your muzzle velocity to 350 fps, that alone will increase your ROF as well as increase the life of your gearbox shell.
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