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  2. Are forced-reset triggers illegal machine guns? ATF and gun ...

    www.aol.com/news/forced-reset-triggers-illegal...

    Rare Breed Triggers, founded in Fl. The internet videos are alarming to some, thrilling to others: Gun enthusiasts spraying bullets from AR-15-style rifles equipped with an after-market trigger ...

  3. List of AR platform cartridges - Wikipedia

    en.wikipedia.org/wiki/List_of_AR_platform_cartridges

    300 AAC Blackout : Uses military 5.56x45 (also .223). The shoulder is reformed, length is trimmed, neck is sized to .308. This caliber is very popular, and examples are available in a wide variety of styles. Bullet weights can currently be found between 100gr to 220gr 7.62x40 Wilson Tactical (300 HAM'R) : Uses 5.56 NATO cases (also .223 ...

  4. .300 AAC Blackout - Wikipedia

    en.wikipedia.org/wiki/.300_AAC_Blackout

    The .300 AAC Blackout is a SAAMI-standardized .300-221. Hornady states that any rifle chambered for the 300 AAC Blackout can shoot their .300 Whisper ammunition, which is made within .300 AAC Blackout specs. The reloading dies for these two cartridges are often the same. [7]

  5. Knight's Armament Company PDW - Wikipedia

    en.wikipedia.org/wiki/Knight's_Armament_Company_PDW

    The larger diameter, shorter 6 mm cartridge is optimized for these shorter barrel lengths, and would perform less efficiently from rifle-length barrels. The round's muzzle energy is 831 ft⋅lbf (1,127 J) versus 792 ft⋅lbf (1,074 J) for a 5.56 mm bullet, again from the same 10" standard barrel.

  6. Maker of rapid-fire triggers falsely told customers they are ...

    www.aol.com/news/maker-rapid-fire-triggers...

    The judge barred Rare Breed Triggers from selling any more of its forced-reset triggers until further notice — a blow to the company's defense against the government's civil fraud lawsuit, which ...

  7. Small arms ammunition pressure testing - Wikipedia

    en.wikipedia.org/wiki/Small_arms_ammunition...

    The piezo measuring device (transducer) is positioned at a distance of 25 millimetres (0.98 in) from the breech face when the length of the cartridge case permits that, including limits. When the length of the cartridge case is too short, pressure measurement will take place at a chambering specific defined shorter distance from the breech face ...

  8. Table of handgun and rifle cartridges - Wikipedia

    en.wikipedia.org/wiki/Table_of_handgun_and_rifle...

    A guide to the recoil from the cartridge, and an indicator of bullet penetration potential. The .30-06 Springfield (at 2.064 lbf-s) is considered the upper limit for tolerable recoil for inexperienced rifle shooters. [2] Chg: Propellant charge, in grains; Dia: Bullet diameter, in inches; BC: Ballistic coefficient, G1 model; L: Case length (mm)

  9. Unsafe firearm and cartridge combinations - Wikipedia

    en.wikipedia.org/wiki/Unsafe_firearm_and...

    Firing a .300 Blackout round in a .223 Remington rifle Firing shotgun shell of the correct gauge or bore, but in a chamber length that is too short (for example a 70 mm shell in 65 mm chamber) While the table below lists most unsafe combinations known by SAAMI, the list is not exhaustive of all dangerous combinations due to the large number of ...