Comparando todos os meus uppers! Veja as diferenças e acerte na escolha

This guide details the assembly and testing of the BCM 11.5'' FSB Upper Receiver Group, a duty-grade AR-15 component. It covers inspection, accessory mounting, accuracy evaluation with various ammunition, and extensive reliability testing. The review highlights the benefits of the 11.5-inch barrel for increased dwell time and consistent gas pressure, as assessed by a seasoned firearms expert from Mrgunsngear.

This video guides viewers through selecting an AR-15 upper receiver to complete a build. It presents three distinct options: an ODG AT3 slick side upper, a black Aero Precision upper with a forward assist, and an FDE Odin Works upper. The presenter highlights aesthetic differences and the functional consideration of a forward assist.

This video provides an unboxing and initial overview of the Geissele Super Duty MOD1 complete upper receiver with an 11.5-inch barrel in 5.56 NATO. The presenter highlights key features such as the cold hammer-forged, chrome-lined barrel, the MK16 handguard, and the included enhanced bolt carrier group and airborne charging handle. It also touches on the availability of BUA (blemished) products from Geissele via Primary Arms.

This video details changes in the Brownells BRN-180 Gen 3 upper receiver compared to the Gen 2. Key improvements include a non-reciprocating charging handle with a gasket system to prevent debris ingress, addressing a major Gen 2 complaint. The design also incorporates a reduced profile to improve compatibility with extended optic mounts, though some larger accessory nuts may still present minor interference.

This video provides a first look at the Griffin Armament Mark1 CQB 12.5 upper receiver and the new Optimus 6 suppressor. It demonstrates a cold start drill, malfunction clearing, and the process of zeroing iron sights at 50 yards. The presenter also discusses the suppressor's performance and potential use with various 6mm calibers.

This video reviews the Griffin Armament AR-15 Lowprofile Upper Receiver and the Dual Lock Silencer system. It details the materials, manufacturing specifications, and features of both components, highlighting their compatibility and performance benefits for AR-15 platforms. The review emphasizes the durability, strength, and advanced technologies incorporated into these Griffin Armament products.

This video explores the compatibility of a 50 BMG cartridge with a 12 gauge flare gun. The experiment reveals that while the cartridge fits, the flare gun's mechanism cannot ignite the tough 50 BMG primers. However, it successfully fires a standard 12 gauge blank, highlighting the difference in primer hardness. The content is presented from a hobbyist perspective, focusing on experimental curiosity rather than professional instruction.

This video from Tática Civil, featuring an expert instructor, explains the dangers of firing upwards due to projectile drop and terminal velocity. It demonstrates the safe use of 9mm shot shells for controlled demonstrations, highlighting the Canik Mete MC9 Prime with a Gideon Valor red dot sight. The instructor emphasizes crucial firearm safety protocols.

This guide details an experimental test to debunk the myth that a .50 BMG round passing near a target can be lethal. Using a ballistic mannequin, cardboard indicators, and a concrete backstop, the test demonstrates that a near miss from a .50 BMG round does not impart enough shockwave or air pressure to cause fatal injury, though the projectile itself possesses immense kinetic energy as evidenced by its impact on the concrete block. The test was conducted objectively by an individual with high authority, indicated by their empirical testing methods and proper safety protocols.

This video demonstrates a dramatic comparison between the .22 LR and .50 BMG calibers using a ballistic head model. The .50 BMG, when attached to an AR-15 platform via a Raptor upper, shows vastly superior destructive power, completely obliterating the model, while the .22 LR causes only superficial damage. The host's enthusiastic and experimental approach, combined with clear technical explanations, highlights the significant energy difference between these two rounds.