Projectile launcher

1. A projectile launcher comprising:

a barrel defining a longitudinal bore dimensioned to receive a projectile;

a receiver including a breech proximate the barrel, wherein the receiver includes a grip portion defining an opening dimensioned to receive a compressed gas cartridge, wherein the receiver includes a gas transfer mechanism configured to pierce a seal of the compressed gas cartridge disposed in the opening;

a valve assembly configured to be in fluid communication with the gas transfer mechanism, wherein the valve assembly is configured to selectively vent a source of compressed gas into the breech to propel a projectile out of the barrel;

a firing assembly configured to actuate the valve assembly responsive to a trigger pull;

a selector assembly operatively connected with the grip portion, wherein the selector assembly includes a door movable between an open position that allows the compressed gas cartridge to be removed from the opening, a closed position that retains the compressed gas cartridge in the opening, and an activation position where the door cooperates with the gas transfer mechanism to pierce the seal in the compressed gas cartridge;

wherein the door comprises a proximal end pivotally connected to the grip portion and a distal end extending from the proximal end; and

wherein the distal end of the door moves further into the opening in the grip portion when in the activation position.

2. The projectile launcher of claim 1 , wherein the distal end of the door includes a magnetically attracted material and the selector assembly includes a magnet to retain the door in the closed position.

3. The projectile launcher of claim 2 , wherein the magnet is spring-loaded to urge the distal end of the door from the activation position to the closed position.

4. The projectile launcher of claim 3 , wherein a force applied to the distal end of the door overcomes the spring-loaded magnet such that the door moves the compressed gas cartridge towards the gas transfer mechanism to pierce the seal.

5. The projectile launcher of claim 4 , wherein the selector assembly is configured to latch the door in the closed position with a force less than a sufficient force to move the spring-loaded magnet due to the magnetic coupling between the magnet and the door.

6. The projectile launcher of claim 5 , wherein the door includes a low friction surface configured to engage the compressed gas cartridge when the door moves from the closed position to the activation position.

7. The projectile launcher of claim 6 , wherein the low friction surface is a roller.

8. The projectile launcher of claim 1 , wherein the door is movable to a venting position where the door retains the compressed gas cartridge in the opening, but spaced apart from the gas transfer mechanism to vent any residual gas in the cartridge out of the opening.

9. The projectile launcher of claim 8 , wherein the door is configured to pivot away from the gas transfer mechanism when moving between the closed position to the venting position.

10. The projectile launcher of claim 9 , wherein the door is configured to be biased away from the open position to the venting position to prevent residual gas in the cartridge from driving the cartridge out of the opening in the grip.

11. A projectile launcher comprising:

a barrel defining a longitudinal bore dimensioned to receive a projectile;

a receiver including a breech proximate the barrel, wherein the receiver includes an opening dimensioned to receive a compressed gas cartridge, wherein the receiver includes a gas transfer mechanism configured to pierce a seal of the compressed gas cartridge disposed in the opening;

a valve assembly configured to be in fluid communication with the gas transfer mechanism, wherein the valve assembly is configured to selectively vent a source of compressed gas into the breech to propel a projectile out of the barrel;

a firing assembly configured to actuate the valve assembly responsive to a trigger pull;

a selector assembly including a door pivotal between an open position, a closed position and an activation position for selectively retaining the compressed gas cartridge in the opening, wherein the selector assembly includes at least one magnet for retaining the compressed gas cartridge in the opening without piercing the seal when a force applied to the door is less than a predetermined force in the closed position and to pierce the seal when a force greater than the predetermined force is applied to the door in the closed position; and

wherein the at least one magnet is spring-loaded, and the predetermined force overcomes the urging on the magnet to allow the door to move to the activation position.

12. A method of operating a projectile launcher, the method comprising the steps of:

pivoting a door covering an opening in a grip of a projectile launcher to an open position that provides access to the opening;

inserting a compressed gas cartridge into the opening in the grip;

pivoting the door to a closed position with a first force to retain the compressed gas cartridge in the opening, wherein the first force is insufficient to move the door to an activation position that pierces the compressed gas cartridge; and

applying a second force to the door to pivot the door past the closed position to the activation position that pierces the compressed gas cartridge, wherein the second force is greater than the first force.

13. The method of claim 12 , further comprising the step of pivoting the door to a venting position in which the door retains the compressed gas cartridge in a position that allows residual gas to be vented.

14. The method of claim 13 , further comprising the step of pivoting the door from the venting position and the open position and removing the compressed gas cartridge.

15. The method of claim 14 , wherein the door is retained in the closed position via a magnetic connection.