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A compressed gas powered projectile accelerator employing dynamic-regulation; having, a valve slider, reciprocally moveable within a passage, being releasable by the action of a sear and trigger from a cocked position, controlling flow of compressed gas into a breech; or an electric valve performing

A compressed gas powered projectile accelerator employing dynamic-regulation; having, a valve slider, reciprocally moveable within a passage, being releasable by the action of a sear and trigger from a cocked position, controlling flow of compressed gas into a breech; or an electric valve performing the same function under the control of an electronic circuit and trigger; and a spring-biased bolt, reciprocally moveable within the breech, controlling the flow of projectiles and compressed gas into a barrel.

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A compressed gas powered projectile accelerator employing dynamic-regulation; having, a valve slider, reciprocally moveable within a passage, being releasable by the action of a sear and trigger from a cocked position, controlling flow of compressed gas into a breech; or an electric valve performing

A compressed gas powered projectile accelerator employing dynamic-regulation; having, a valve slider, reciprocally moveable within a passage, being releasable by the action of a sear and trigger from a cocked position, controlling flow of compressed gas into a breech; or an electric valve performing the same function under the control of an electronic circuit and trigger; and a spring-biased bolt, reciprocally moveable within the breech, controlling the flow of projectiles and compressed gas into a barrel. tion. A valve open/close mechanism is also disposed for opening/closing all at once portions upstream side of the joined portions of both the intake passages of the engine. ousing, wherein the biasing housing comprises a center axis, wherein the second end of the rod runs through the center axis of the biasing housing; a pair of lever means, wherein each lever means is pivotally connected between the pivot point of the swing arm and the second end of the housing; and a cable guide means positioned at the first end of each swing arm, the cable guide means adapted for slidably receiving and separating the first and second cable; wherein when the bowstring is drawn to a draw position, the cables move in the direction of the bowstring urging the swing arms in the direction of the bowstring; wherein the movement of the swing arms moves the pair of lever means, wherein the movement of the pair of lever means urges the biasing housing in the direction of the handle compressing the biasing means inside the biasing housing. 3. The cable guard of claim 2, wherein when the bowstring is released, the biasing housing moves back to it original position and the first and second cables are compelled to stop vibrating by the movement of the biasing housing returning to the original position thereby decreasing the amount of vibration noise produced by the vibrating of the first and the second cable. 4. The cable guard of claim 2 wherein the biasing housing includes a first portion and a second portion, wherein the diameter of the first portion is greater than the diameter of the second portion forming a seat. 5. The cable guard of claim 2 wherein the biasing means is elected from the group consisting of coil spring, air spring, and leaf spring. 6. The cable guard of claim 2 wherein the biasing means comprises at least one spring. 7. The cable guard of claim 2 further comprising an adjusting rod adapted to engage the biasing means and change a pre-set compression force of the biasing means. 8. The cable guard of claim 2 wherein the compression of the biasing means adds an extra tension force to the biasing means, and wherein the extra tension force provides the arrow with an increased speed. 9. The cable guard of claim 2 wherein the guide means includes a first and a second opening formed therethrough. 10. The cable guard of claim 9 wherein the depth of the first opening is greater than the depth of the second opening to avoid that the cables touch each other. 11. The cable guard of claim 2 wherein the rod comprises a first section and a second section, wherein the first section has a diameter greater than a diameter of the second section, wherein the first section includes an internal threaded end and the second section includes an external threaded end, wherein the external threaded end of the second section is threaded to the internal threaded end of the first section. 12. The cable guard of claim 2 wherein the first end of the rod has a diameter greater than a diameter of the second end of the rod forming a seat. 13. The cable guard of claim 2 wherein the housing further comprises an internal stopper located at the second end of the housing. 14. A cable guard for use with a compound bow, the compound bow having a handle portion and a pair of opposite bow limbs, a first and a second cable which cross one another in extending between opposite bow limbs and a bowstring, the cable guard comprising: a rod having a first end and a second end, wherein the first end of the rod is attached to the handle portion of the compound bow; a swing arm attached to the second end of the rod, a biasing means disposed inside a housing, wherein the housing comprises a center axis, wherein the second end of the rod runs through the center axis of the housing; wherein when the bowstring is drawn to a draw position, the swing arm folds back moving forward the rod compressing the biasing means.