对比外活塞AR和内活塞(直吹)AR的优缺点

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Larry vickers 的话：
1) Do I need a barrel length shorter than 14.5 inches?
2) Do I need to run my gun suppressed a lot?
3) Do I need to shoot a lot of full auto?
4) Do I need to shoot a wide variety of ammo?
Piston guns have been shown to be superior in those four categories over a DI gun. If you can say no to all four questions a good DI gun will do you fine.