| 摘要 |
<p>A semi-automatic or automatic rifle comprising:
a receiver (296) having an integral hand guard portion;
a barrel (300) removably connected to the receiver (296), the integral hand guard portion extending over and surrounding the barrel;
a removable hand guard portion (298) removably connected to the receiver and having an accessory device mounting rail (484), the removable hand guard portion (298) being mateable with the integral hand guard portion of the receiver (296); and
a quick release lock mounted to at least one of the removable hand guard portion (298) or the receiver (296) for locking the accessory device mounting rail (484) to the receiver;
wherein the quick release lock has a movable locking member (500) movable between a locked and unlocked positions, wherein when in the locked position the locking member (500) locks the removable hand guard portion (298) in an installed position to the receiver (296), and when the locking member (500) is in the unlocked position, the mounting rail (484) is unlocked and freely movable relative to the receiver (296), wherein the locking member has an angled engagement portion (513) protruding from the removable mounting rail and engaging a corresponding angled recess (512) in the receiver (296), wherein the locking member (500) acts as a wedge in the recess (512) with the removable hand guard portion (298) preloaded with a biasing force against the integral hand guard portion.
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