Abstract: A firearm recoil system is disclosed. The firearm recoil system may include first and second guide rods attached to a bolt carrier group. The first and second guide rods may extend forward through an upper receiver. The firearm recoil system also may include first and second recoil springs. The first recoil spring may be disposed around the first guide rod, and second recoil spring may be disposed around the second guide rod.

Abstract: A firearm recoil system is disclosed. The firearm recoil system may include first and second guide rods attached to a bolt carrier group. The first and second guide rods may extend forward through an upper receiver. The firearm recoil system also may include first and second recoil springs. The first recoil spring may be disposed around the first guide rod, and second recoil spring may be disposed around the second guide rod.

Abstract: A grip for an AR-10 and AR-15 automatic rifle comprises a skeletonized frame that mates with the receiver of the automatic rifle. The skeletonized frame includes a plurality of frame members that interconnect at angles to reinforce the structural integrity of the frame. The skeletonized frame comprises an open area. The open area stores items pertinent to operation of the automatic rifle. The frame is also configured to receive multiple interchangeable grip panels for altering the visual and functional aspects of the grip. The interchangeable grip panels detachably recess into an appropriate section of the frame, such that their edges are protected from damage from inadvertent impact and abrasion. For example, the grip panels provide a texture that helps cushion the palm of the hand, or accommodate left hands and/or right hands. The panels align through an alignment pin that passes through the opening of the frame.

Abstract: The disclosure generally relates to a wind indicating device. In various embodiments, the device can be used for wind detection and wind direction determination. The device can, in various embodiments, produce visible vapor and/or smoke. The visible smoke can interact with wind such that an operator can see which direction the wind is traveling and/or swirling. This can be beneficial for operators in the pursuit of game for hunting purposes, or in more general application in military actions.