Abstract: A bolt catch device for firearms, which is connected to a lower housing and includes a linkage portion and a release portion. The linkage portion is connected to the lower housing by a first pivot shaft and has an abutting member. The release portion is connected with the lower housing by a second pivot shaft, and has a pin and a bolt catch. When the user uses the trigger finger to move the bolt catch, the bolt catch performs a rotational displacement movement from a first position with the second pivot shaft as the center, so that the bolt catch is located at the second position. The abutting member performs a rotational displacement movement centered on the first pivot shaft, and the abutting member is away from the bolt, and the bolt moves to complete the feeding of the ammunition.

Abstract: A gun device allowing replacement of barrels with different sizes, having a gun body, one end of the gun body has an opening. The opening outer edge has a threading and a positioning slot. The gun body connects with a first size barrel by connecting the threading with a lock. The gun device further comprising: a guide adapter, a second size barrel and a barrel key. The guide adapter has a positioning body, a projecting part, and a first groove, the projecting part alignment connects with the positioning slot. The second size barrel has a second groove, the first groove corresponding with the second groove.

Abstract: Provided is an assembled electric toy gun that allows a spring in the toy gun to be changed quickly for altering projectile propulsion strength. The assembled electric toy gun has a positioning structure whereby a motor-end terminal and a battery-end terminal are mounted in place and disconnected quickly and efficiently. The assembled electric toy gun has a cylinder piston unit and a barrel which are aligned with different axial directions to thereby prevent the cylinder piston unit in operation from undergoing energy loss which might otherwise compromise the propulsion speed of a projectile. The assembled electric toy gun has a firing mode system which turns off a power converter whenever a trigger switch is in a suspension state, thereby saving the power of the toy gun. The assembled electric toy gun has a micro control unit connected to the power converter, thereby effectively reducing power loss.

Abstract: A gun device with bolt catch, having a receiver including a bolt chamber and magazine well, comprising: a magazine, bolt, and bolt catch. The magazine includes a follower and bolt lock trigger. The magazine and bolt are disposed in the magazine well and bolt chamber, respectively. The bolt catch, which includes an engaging body, is disposed through a lateral surface thereof on the receiver and located at either an initial position or engaging position. Positioning the follower at a first position allows the follower to be positioned beside the bolt lock trigger, extends the bolt lock trigger from the magazine by a height, moves the bolt catch, positions the engaging body beside the bolt, positions the bolt catch at the engaging position, and fixes the bolt in place at an open position.

Abstract: A gear checked construction for a toy gun comprises a gun body, a piston, a driving gear, and a check assembly. The piston is mounted inside the gun body and a rack is formed on the bottom of the piston. The driving gear engages with the rack to drive the piston and includes a clamping part. The check assembly comprises a hinge and a check bar. The hinge is mounted inside the gun body and the check bar is set around the hinge and comprises a forward part and a reverse part. The clamping part touches on the forward part and bursts through the check bar when the driving gear rotates in one direction to drive the piston, and the clamping part engages with the reverse part to stop the driving gear's rotation when the driving gear rotates in the other direction.

Abstract: A toy gun construction, comprising a gun housing, a reciprocating assembly and a latch member. The reciprocating assembly has a sliding curve plate and a first elastic unit. The latch member is assembled with a connecting rod, an engaging portion, an extension portion and a second elastic member. The sliding curve plate moves from a dynamic position to a static position, and when the sliding curve plate is at dynamic position the engaging portion is stuck in the indention. By pushing the extension portion the latch member moves toward the sliding curve plate to release the engaging portion from the indention and the sliding curve plate is pulled back to the static position by the first elastic member.