1 Monocot and dicot are short for monocotyledon and dicotyledon. 2  Mono-means one, and monocots have one cotyledon. 3  Di-means two, and dicots have two cotyledons. monocot plant has one cotyledon (scutellum) in its embryo whereas a dicot plant has two cotyledones. 2. A moncot pl â¦ ant has generally isobilateral leaf with parallel venation whereas a diicot plant has dorsiventral leaf with reticulate venation. 3.
The AR-15 was developed as a lighter, 5.56 mm version of the AR-10. The AR in all ArmaLite pattern firearms simply stands for ArmaLite, and can be found on most of the company's firearms: AR-5, a .22 caliber rifle; the AR-7, another .22 caliber; the AR-17 shotgun; the AR-10 rifle; and the AR-24 pistol.
Those ballistic differences disappear when you compare the AK-74, instead of the AK-47, to the AR-15. The AK-74 fires a 5.45x39mm cartridge with similar performance to the NATO 5.56mm standard round. The AR still wins on accuracy, but the ballistics are the same out to 600 yards. What does that mean?