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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 All Purpose model comes in 12 gauge with a 28-inch barrel, or 20 gauge with 26-inch barrel or 22-inch barrel with vent rib (youth version). Security comes with an 18 + 1 ⁄ 2-inch or 20-inch non-vent-rib barrel. The Security w/ Top-Folding Stock comes in 18 + 1 ⁄ 2-inch only, featuring a pistol grip. The Slug model comes with 24-inch ...
The receiver is manufactured from Ergal 55 alloy which makes for a lightweight shotgun at only 3 kg, light compared to many other tactical shotguns such as the Franchi SPAS-12 which weighs close to 5 kg. The bolt is locked into place by a piece of aluminum which swings into place and engages a notch in the barrel extension to lock the bolt to ...
Barrel length: 450 mm (18 in) ... The Franchi SPAS-15 is a dual-mode 12 gauge combat shotgun ... a gas piston drives a bolt carrier and rotating bolt. In pump-action ...
The Winchester Model 1200 pump action shotgun employs a rotating bolt in a bolt carrier (slide) rather than the tilting breechblock used in the Model 12. [10] The Model 1200 was the second shotgun design to utilize a rotating bolt; the Armalite AR-17 being the first. [6] The bolt locks directly into the barrel and has four locking lugs.
Today, most top-level smallbore match rifles are single-shot bolt action rifles. Single-shot bolt actions in .22 caliber were also widely manufactured as inexpensive "boys' guns" in the earlier 20th century; and there have been a few single-shot bolt-action shotguns, usually in .410 bore.
A 12-gauge shotgun, nominally 18.5 mm (0.73 in), can range from a tight 18 mm (0.71 in) to an extreme overbore of 20 mm (0.79 in). Some also claim an increased velocity with the overbored barrels, up to 15 m/s (49 ft/s), which is due to the larger swept volume of the overbored barrel.
The Mossberg 500 is a series of pump-action shotguns manufactured by O.F. Mossberg & Sons. [1] The 500 series comprises widely varying models of hammerless repeaters, all of which share the same basic receiver and action, but differ in bore size, barrel length, choke options, magazine capacity, stock and forearm materials.