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The IWI Carmel is a short-stroke, gas-piston operated rifle chambered in 5.56x45mm, similar to the CZ BREN 2 and the FN SCAR-L.The free-floating barrel is chrome lined and cold hammer-forged, with a 1:7 twist rate and available in a variety of barrel lengths: 10.5", 12", 14.5" and 16".
The standard XM-15 has a forged 7075T6 aircraft-grade aluminum upper and lower receiver. Barrels of XM-15 firearms have a heavy profile and are hard chrome-lined 4150 alloy steel or 416 stainless steel. [2] [4] In Bushmaster's 2016 sales brochure, all new-production XM-15s are stated to be supplied with a 4150 steel barrel. [5]
Driving bands and obturator rings are made from material that will deform and seal the barrel as the projectile is forced from the chamber into the barrel. Sabots use driving bands and obturators, because the same manufacturing tolerance issues exist when sealing the saboted projectile in the barrel, but the sabot itself is a more substantial ...
The CAR-15 name was an attempt to re-associate the AR-15 name with Colt, since the AR initially stood for "Armalite Rifle" the original manufacturer of the Armalite AR-15. Colt later abandoned the CAR-15 concept, but continued to make carbine variations, using the "M16" brand for select-fire models and the "Colt AR-15" brand for semi-automatic ...
The Mk 12 Mod H was used primarily by Army SOF and Special Mission Units (SMU), and featured a retrofit upper of the Mod 0 with PRI Gen3 round handguards and a shorter RECCE rail to replace the original Swan Sleeve, reducing weight, and either Douglas or Noveske barrels made with the SPR profile in a rifle length gas system. [9]