polygonal bore
1Polygonal rifling — is a type of rifling wherein the traditional lands and grooves are replaced by hills and valleys in a rounded polygonal pattern, usually a hexagon or octagon. HistoryWhile polygonal rifling has been around since the earliest days of rifled… …
2polygonal rifling — Helical grooves in the bore of a firearm barrel to impart rotary motion to a projectile …
3Heckler & Koch G41 — Infobox Weapon name=G41 caption= origin=flag|West Germany type=Assault rifle is ranged=yes service= used by=See Users wars=2007 Lebanon conflict designer=Heckler Koch design date=1981 manufacturer=Heckler Koch production date= number=… …
4Heckler & Koch HK41 — Infobox Weapon name=Heckler Koch 41 caption=HK 41 rifle with mounted scope origin=flagcountry|Germany type=Sporting and Target Rifle is ranged=yes service= used by= wars= designer= design date= manufacturer=Heckler Koch production date=1964 1976… …
5Heckler & Koch USP — Type Pistol Place of origin …
6Internal ballistics — Internal ballistics, a subfield of ballistics, is the study of a projectile s behavior from the time its propellant s igniter is initiated until it exits the gun barrel. The study of internal ballistics is important to designers and users of… …
7Rifling — refers to the helix shaped pattern in the barrel of a firearm, which imparts a spin to a projectile around its long axis. This spin serves to gyroscopically stabilize the projectile, improving its aerodynamic stability and accuracy.Rifling is… …
8JERUSALEM — The entry is arranged according to the following outline: history name protohistory the bronze age david and first temple period second temple period the roman period byzantine jerusalem arab period crusader period mamluk period …
9Canon rayé — Le rainurage désigne le processus de fabrication de rainures hélicoïdales par l alésage du canon d une arme à feu. Ces rayures font tourner le projectile sur lui même autour de son axe longitudinal, cette rotation permettant la stabilisation… …
10Western architecture — Introduction history of Western architecture from prehistoric Mediterranean cultures to the present. The history of Western architecture is marked by a series of new solutions to structural problems. During the period from the… …
