Abstract: A ballistic effect compensating reticle (e.g., 200 or 300) and ammunition adaptive aim compensation method for rifle sights or projectile weapon aiming systems includes a multiple point elevation and windage aim point field (e.g., 150 or 350) including a primary aiming mark (e.g., 158 or 358) indicating a primary aiming point adapted to be sighted-in at a first selected range and a plurality of secondary aiming points arrayed beneath the primary aiming mark. The method for compensating for a projectile's ballistic behavior while developing a field expedient firing solution permits the shooter to express the field expedient firing solution in units of distance, (e.g., yards or meters, when describing or estimating range and nominal air density ballistic characteristics), and velocity (e.g., mph or kph, for windage hold points). The adaptive method allows a shooter in the field to adapt to changes in available ammunition (e.g.

Abstract: A ballistic effect compensating reticle (e.g., 200 or 300) and aim compensation method for rifle sights or projectile weapon aiming systems includes a multiple point elevation and windage aim point field (e.g., 150 or 350) including a primary aiming mark (e.g., 158 or 358) indicating a primary aiming point adapted to be sighted-in at a first selected range and a plurality of secondary aiming points arrayed beneath the primary aiming mark. The method for compensating for a projectile's ballistic behavior while developing a field expedient firing solution permits the shooter to express the field expedient firing solution in units of distance, (e.g., yards or meters, when describing or estimating range and nominal air density ballistic characteristics), and velocity (e.g., mph or kph, for windage hold points).

Abstract: An improved aim compensation method using ballistic effect compensating reticle 300 includes choosing, for a user-selected target, corresponding spin-drift compensated Point of Aim (POA) within a multiple point elevation and windage aim point field (e.g., 350) including a primary aiming mark (e.g., 358) aligned horizontally with left and right leveling reference lines (e.g., 370L, 370R) which point inwardly to the primary aiming point to be sighted-in at a first selected range. The aim point field also includes a plurality of secondary downrange aiming points arrayed beneath the primary aiming mark, and the downrange aiming points are arrayed in lines of dots or downrange windage hold points positioned to compensate for ballistic effects such as spin drift.

Abstract: A duplex projectile cartridge system (e.g., 400) for use in a standard rifle (e.g., 10) has a front bullet (e.g., 320) and a substantially cylindrical back bullet (e.g., 440) coaxially aligned with one another. The front bullet's base is held in the cartridge case neck far enough to engage the back bullet's front surface so that the case neck simultaneously bears upon the front bullet and the back bullet. Optionally, the cartridge configuration orients the back bullet and defines one or more gas bypass lumens to allow expanding gas to initially bypass the back bullet and drive the front bullet distally to force an inter-bullet gap (e.g., “IBG” 480) upon firing.

Abstract: A ballistic effect compensating reticle (e.g., 200 or 300) and aim compensation method for rifle sights or projectile weapon aiming systems includes a multiple point elevation and windage aim point field (e.g., 150 or 350) including a primary aiming mark (e.g., 158 or 358) indicating a primary aiming point adapted to be sighted-in at a first selected range and a plurality of secondary aiming points arrayed beneath the primary aiming mark. The method for compensating for a projectile's ballistic behavior while developing a field expedient firing solution permits the shooter to express the field expedient firing solution in units of distance, (e.g., yards or meters, when describing or estimating range and nominal air density ballistic characteristics), and velocity (e.g., mph or kph, for windage hold points).

Abstract: An improved firearm accessory mounting interface 200 with a durable integral mirage shield 200 that adds minimal or no weight to a weapon system, is unlikely to snag and is comfortable to hold includes a tubular handguard's cylindrical sidewall which is preferably defined with four radially spaced quadrants each having, preferably, first and second spaced arrays of parallel, elongated grooves 232, 234 separated by an external surface with at least two spaced apart transverse notches 250 which are configured to define a firearm accessory mount rail segment 260 and ergonomically comfortable grasping surface that directs hot air away from the handguard's interior and provides a plurality of mounts compatible with accessory clamps configured to engage and hold a Picatinny rail.

Abstract: A ballistic effect compensating reticle (e.g., 200 or 300) and aim compensation method for rifle sights or projectile weapon aiming systems includes a multiple point elevation and windage aim point field (e.g., 150 or 350) including a primary aiming mark (e.g., 158 or 358) indicating a primary aiming point adapted to be sighted-in at a first selected range and a plurality of secondary aiming points arrayed beneath the primary aiming mark. The method for compensating for a projectile's ballistic behavior while developing a field expedient firing solution permits the shooter to express the field expedient firing solution in units of distance, (e.g., yards or meters, when describing or estimating range and nominal air density ballistic characteristics), and velocity (e.g., mph or kph, for windage hold points).

Abstract: A ballistic effect compensating reticle 300 and aim compensation method for rifle sights or projectile weapon aiming systems includes a multiple point elevation and windage aim point field (e.g., 350) including a primary aiming mark (e.g., 358) aligned horizontally with left and right leveling reference lines (e.g., 370L, 370R) which point inwardly to the primary aiming point to be sighted-in at a first selected range. The aim point field also includes a plurality of secondary downrange aiming points arrayed beneath the primary aiming mark, and the downrange aiming points are arrayed in lines of dots or downrange windage hold points positioned to compensate for ballistic effects such as spin drift.

Abstract: A ballistic effect compensating reticle (e.g., 200 or 300) and aim compensation method for rifle sights or projectile weapon aiming systems includes a multiple point elevation and windage aim point field (e.g., 150 or 350) including a primary aiming mark (e.g., 158 or 358) indicating a primary aiming point adapted to be sighted-in at a first selected range and a plurality of secondary aiming points arrayed beneath the primary aiming mark. The method for compensating for a projectile's ballistic behavior while developing a field expedient firing solution permits the shooter to express the field expedient firing solution in units of distance, (e.g., yards or meters, when describing or estimating range and nominal air density ballistic characteristics), and velocity (e.g., mph or kph, for windage hold points).

Abstract: A dynamic ballistic effect compensating reticle 700 and an aim compensation method for use in rifle sights or projectile weapon aiming systems 10 includes a multiple point elevation and windage aim point field 750 including a primary aiming mark 758 indicating a primary aiming point adapted to be sighted-in at a first selected range (e.g., 200 yds) and a plurality secondary aiming point arrays 760D, 760E beneath the primary aiming mark. The method for compensating for a projectile's ballistic behavior while developing a field expedient firing solution permits the shooter to express the field expedient firing solution in units of distance, (e.g., yards or meters, when describing or estimating range and nominal air density ballistic characteristics), and velocity (e.g., mph or kph, for windage hold points). Reticle aim point field 750 permits the marksman to adjust the firing solution for momentary atmospheric effects and operational contingencies such as variations in ammunition.

Abstract: A dynamic ballistic effect compensating reticle 700 and an aim compensation method for use in rifle sights or projectile weapon aiming systems 10 includes a multiple point elevation and windage aim point field 750 including a primary aiming mark 758 indicating a primary aiming point adapted to be sighted-in at a first selected range (e.g., 200 yds) and a plurality secondary aiming point arrays 760D, 760E beneath the primary aiming mark. The method for compensating for a projectile's ballistic behavior while developing a field expedient firing solution permits the shooter to express the field expedient firing solution in units of distance, (e.g., yards or meters, when describing or estimating range and nominal air density ballistic characteristics), and velocity (e.g., mph or kph, for windage hold points). Reticle aim point field 750 permits the marksman to adjust the firing solution for momentary atmospheric effects and operational contingencies such as variations in ammunition.

Abstract: A dynamic ballistic effect compensating reticle and an aim compensation method for use in rifle sights or projectile weapon aiming systems includes a multiple point elevation and windage aim point field including a primary aiming mark indicating a primary aiming point adapted to be sighted-in at a first selected range (e.g., 200 yds) and a plurality sloped secondary aiming point arrays beneath the primary aiming mark. The method for compensating for a projectile's ballistic behavior while developing a field expedient firing solution permits the shooter to express the field expedient firing solution in units of distance, (e.g., yards or meters, when describing or estimating range and nominal air density ballistic characteristics), and angular offset of azimuth (e.g., MILS or MOA) for crosswind jump corrected windage hold points.

Abstract: A ballistic effect compensating reticle 300 and aim compensation method for rifle sights or projectile weapon aiming systems includes a multiple point elevation and windage aim point field (e.g., 350) including a primary aiming mark (e.g., 358) aligned horizontally with left and right leveling reference lines (e.g., 370L, 370R) which point inwardly to the primary aiming point to be sighted-in at a first selected range. The aim point field also includes a plurality of secondary downrange aiming points arrayed beneath the primary aiming mark, and the downrange aiming points are arrayed in lines of dots or downrange windage hold points positioned to compensate for ballistic effects such as spin drift.

Abstract: A dynamic ballistic effect compensating reticle and an aim compensation method for use in rifle sights or projectile weapon aiming systems includes a multiple point elevation and windage aim point field including a primary aiming mark indicating a primary aiming point adapted to be sighted-in at a first selected range (e.g., 200 yds) and a plurality secondary aiming point arrays beneath the primary aiming mark. The method for compensating for a projectile's ballistic behavior while developing a field expedient firing solution permits the shooter to express the field expedient firing solution in units of distance, (e.g., yards or meters, when describing or estimating range and nominal air density ballistic characteristics), and velocity (e.g., mph or kph, for windage hold points). The reticle aim point field permits the marksman to adjust the firing solution for momentary atmospheric effects and operational contingencies such as variations in ammunition.

Abstract: A dynamic ballistic effect compensating reticle and an aim compensation method for use in rifle sights or projectile weapon aiming systems includes a multiple point elevation and windage aim point field including a primary aiming mark indicating a primary aiming point adapted to be sighted-in at a first selected range (e.g., 200 yds) and a plurality sloped secondary aiming point arrays beneath the primary aiming mark. The method for compensating for a projectile's ballistic behavior while developing a field expedient firing solution permits the shooter to express the field expedient firing solution in units of distance, (e.g., yards or meters, when describing or estimating range and nominal air density ballistic characteristics), and angular offset of azimuth (e.g., MILS or MOA) for crosswind jump corrected windage hold points.

Abstract: A ballistic effect compensating reticle (e.g., 200 or 300) and aim compensation method for rifle sights or projectile weapon aiming systems includes a multiple point elevation and windage aim point field (e.g., 150 or 350) including a primary aiming mark (e.g., 158 or 358) indicating a primary aiming point adapted to be sighted-in at a first selected range and a plurality of secondary aiming points arrayed beneath the primary aiming mark. The method for compensating for a projectile's ballistic behavior while developing a field expedient firing solution permits the shooter to express the field expedient firing solution in units of distance, (e.g., yards or meters, when describing or estimating range and nominal air density ballistic characteristics), and velocity (e.g., mph or kph, for windage hold points).

Abstract: Mid-call services may be added to a communication session such as a telephone call (call session) by a wireless device on a mobile telephone network by causing the wireless device associated with the communication session to invoke a second call session directed to a vertical service code. The second call session is established on the wireless communication network and terminated on the PSTN to an application server associated with the vertical service code. The application server on the PSTN instantiates the service and matches the service associated with the vertical service code on the second call session with the first call session. The application server then applies the mid-call service associated with the vertical service code to the first call session to thus enable mid-call services to be applied to the first call session by the wireless device.

Abstract: A dynamic ballistic effect compensating reticle and an aim compensation method for use in rifle sights or projectile weapon aiming systems includes a multiple point elevation and windage aim point field including a primary aiming mark indicating a primary aiming point adapted to be sighted-in at a first selected range (e.g., 200 yds) and a plurality secondary aiming point arrays beneath the primary aiming mark. The method for compensating for a projectile's ballistic behavior while developing a field expedient firing solution permits the shooter to express the field expedient firing solution in units of distance, (e.g., yards or meters, when describing or estimating range and nominal air density ballistic characteristics), and velocity (e.g., mph or kph, for windage hold points). The reticle aim point field permits the marksman to adjust the firing solution for momentary atmospheric effects and operational contingencies such as variations in ammunition.

Abstract: A ballistic effect compensating reticle (e.g., 200 or 300) and aim compensation method for rifle sights or projectile weapon aiming systems includes a multiple point elevation and windage aim point field (e.g., 150 or 350) including a primary aiming mark (e.g., 158 or 358) indicating a primary aiming point adapted to be sighted-in at a first selected range and a plurality of secondary aiming points arrayed beneath the primary aiming mark. The method for compensating for a projectile's ballistic behavior while developing a field expedient firing solution permits the shooter to express the field expedient firing solution in units of distance, (e.g., yards or meters, when describing or estimating range and nominal air density ballistic characteristics), and velocity (e.g., mph or kph, for windage hold points).

Abstract: Mid-call services may be added to a communication session such as a telephone call (call session) by a wireless device on a mobile telephone network by causing the wireless device associated with the communication session to invoke a second call session directed to a vertical service code. The second call session is established on the wireless communication network and terminated on the PSTN to an application server associated with the vertical service code. The application server on the PSTN instantiates the service and matches the service associated with the vertical service code on the second call session with the first call session. The application server then applies the mid-call service associated with the vertical service code to the first call session to thus enable mid-call services to be applied to the first call session by the wireless device.