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  2. 6.5mm Grendel - Wikipedia

    en.wikipedia.org/wiki/6.5mm_Grendel

    Depending on their case material and bullet weight, 6.5mm Grendel cartridges weigh 14.7 to 17.8 grams (227 to 275 gr). The case head diameter of the Grendel is the same as that of the 5.6×39mm (.220 Russian), 7.62×39mm and 6.5mm PPC cases. This diameter is larger than the 5.56×45mm NATO, thereby necessitating the use of a non-standard AR-15 ...

  3. 6mm PPC - Wikipedia

    en.wikipedia.org/wiki/6mm_PPC

    An improved 6.5 PPC variation branded the 6.5 Grendel was marketed by Alexander Arms LLC. [9] Others are the 6.5 CSS marketed by CompetitionShooting.com, the 6.5 PPCX developed by Arne Brennan and optimized for 100–108 grains (6.48–7.00 g) 6.5mm bullets, and the 6.5 BPC developed by Jim Borden and Dr. Louis Palmisano and optimized for 81 ...

  4. Desert Tech MDR - Wikipedia

    en.wikipedia.org/wiki/Desert_Tech_MDR

    A large multi shooter community study in 2022, including aftermarket precision vendors such as ES Tactical, was able to quantify the performance of the stock OEM barrel between 1.9 and 5.6 MOA with 5 shot groups in .308 with various ammunition as well as identified a contributing failure mode of Trunnion fasteners loosening over time.

  5. Robinson Armament XCR - Wikipedia

    en.wikipedia.org/wiki/Robinson_Armament_XCR

    The bolt and extractor are designed and patented by Robinson Arms, and promoted as offering higher performance over eight lug M16/M4 type bolts. Other features include a folding stock, telescoping M4 Carbine style stocks, monolithic top Picatinny rail with side and under-barrel rails, and forward assist integrated into left-side charging handle.

  6. AR-15–style rifle - Wikipedia

    en.wikipedia.org/wiki/AR-15–style_rifle

    The semi-automatic bolt carrier has a longer lightening slot to prevent the bolt's engagement with an automatic sear. Due to a decrease in mass, the buffer spring is heavier. On the select-fire version, the hammer has an extra spur which interacts with the additional auto-sear that holds it back until the bolt carrier group is fully in battery ...

  7. Metallic silhouette shooting - Wikipedia

    en.wikipedia.org/wiki/Metallic_silhouette_shooting

    Metallic silhouette shooting is a group of target shooting disciplines that involves shooting at steel targets representing game animals at varying distances, seeking to knock the metal target over. Metallic silhouette is shot with large bore rifles fired freehand without support out to 500 meters, and with large bore handguns from the prone ...

  8. SIG SG 550 - Wikipedia

    en.wikipedia.org/wiki/SIG_SG_550

    It has a shorter 226 mm (8.9 in) barrel (with an open, 3-prong flash suppressor) and gas tube, ventilated handguards and a redesigned bolt carrier group that was integrated with the piston rod to form a single moving assembly. The SG 552 series rifles have a 360 mm (14.2 in) long sight radius.

  9. Overview of gun laws by nation - Wikipedia

    en.wikipedia.org/wiki/Overview_of_gun_laws_by_nation

    Gun laws and policies, collectively referred to as firearms regulation or gun control, regulate the manufacture, sale, transfer, possession, modification, and use of small arms by civilians. [1] Laws of some countries may afford civilians a right to keep and bear arms , and have more liberal gun laws than neighboring jurisdictions.