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I agree with newbie. SR12

poorly designed part? sh!t.

I can tell you at least a dozen other top AEG manufactures who have poorly designed internal parts.
Good thing about G&P's, G&G's, Classic Army, JG, ECHO 1, TM's etc., is all the upgrade parts you can purchase to improve durability and performance. The bad thing about all those is my KWA's still out perform them. I have one G&P that shoots damn close to my KWA's, but I dropped in new gears, piston, mosfet, promy barrel, SCS nub, promy bucking, SP110 spring.

G&G M14's are nice after some internal work & upgrading is completed. It has a good 250ft range.
Very accurate at 200ft. My stock KWA SR10 can hit the same target at 200ft, but does not have the 250ft range (stock KWA). The M14 has a flatter, more direct shot at 200ft.

500fps with .30's = OUCH!

 

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I believe you've seen multiple broken 2GX gear boxes.

Myself, I have seen one SR10 not working properly, because the owner tried to modify the internals
and one KM4 the sector gear broke on it twice. Think the second time, a local "tech" did not install
something correctly. Gun was sent back to KWA and has worked great ever since.

Some people are great experiences with one brand and a poor one with another brand.
My experience has been excellent with the four KWA's I own. Not so good with the G&P's,
and Classic Army. Fair with the G&G. I have had way more issues with their internals
and a ton of compatibility issues with internal upgrade parts, especially on the G&P's and CA's.

KWA pistols on the other hand. I hear how great they are and mine keeps loosing the ball bearing hop up nub. Pistol shoots like crap without that one little ball bearing bb.