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The Hellcat is a striker-fired handgun with a stainless steel slide. Sub-compact in size, its overall length is 6.0 inches (150 mm) with a barrel length of 3.0 inches (76 mm) and a width of 1.0 inch (25 mm). [11] [better source needed] There is a blade safety on the trigger, and an optional low-profile external ambidextrous manual thumb safety.
Springfield Armory, Inc., is an American commercial firearms manufacturer and importer based in Geneseo, Illinois. Founded in 1974 by Bob Reese and family, the company produces rifles such as the M1A and imports handguns such as the XD series and Hellcat .
Miller twist rule is a mathematical formula derived by American physical chemist and historian of science Donald G. Miller (1927-2012) to determine the rate of twist to apply to a given bullet to provide optimum stability using a rifled barrel. [1]
The Springfield Armory XD is a series of semi-automatic pistols produced by Springfield Armory, Inc., along with follow-on variants: XD-M, XD-S, and XD-E. [1] Polymer -framed and predominantly striker-fired , the series is manufactured by HS Produkt in Karlovac, Croatia .
Since barrel length is limited by practical concerns to about arm's length for a rifle and much shorter for a handgun, increasing bore diameter is the normal way to increase the efficiency of a cartridge. The limit to bore diameter is generally the sectional density of the projectile (see external ballistics).
Greater freebore length permits bullets to extend further out of the cartridge case to increase space for propellant within the case. [8] Increasing freebore length in order to increase bullet jump is used to delay the onset of resistance from friction and deformation that results when the bullet engages the rifling. [ 9 ]
Barrel nut Attaching the barrel to the receiver using a barrel nut and a barrel with a shoulder is an alternative to action threads, which has been used in firearms such as the Sten gun and AR-15. Hand tools Quick barrel change systems is an increasingly popular alternative, as seen in for example SIG Sauer 200 STR, Roessler Titan or Blaser R8.
The Springfield Armory EMP is a semi-automatic pistol based on the classic M1911 design and manufactured by Springfield Armory, Inc. Whereas the M1911 uses the .45 ACP cartridge, the EMP uses smaller 9×19mm Parabellum or .40 S&W cartridges.