Can the new 6.8x51 in the M5 rifle defeat a Level 4 SAPI plate? We try our best to find out.

This video provides an expert-level analysis of match-grade ammunition performance on the SIG SPEAR rifle. The speaker, demonstrating high authority, details ballistics, including average velocity (2,664 fps) and standard deviation (11.7), correlating them to target accuracy. The analysis highlights a 2-3 inch grouping, with insights into how bullet design and consistent velocity impact precision.

This video discusses the U.S. military's adoption of the new 6.8x51mm cartridge, branded as the .277 Fury, for its Next Generation Squad Weapon program. The change is driven by a need for a more effective round against modern threats, particularly those with advanced body armor, addressing perceived deficiencies of the 5.56mm and 7.62mm calibers in recent conflicts. The shift signifies a departure from decades of standardization.

This video features an accuracy test of the Sig SPEAR rifle using new 155gr Match ammunition in 6.8x51 (.277 Fury) caliber. The test follows up on a previous video that evaluated the rifle with 113gr solid copper ball ammo, which yielded approximately 4 MOA groups. The focus here is on the performance of the match-grade ammunition with the SPEAR platform, aiming to assess its precision capabilities.

This review of the SIG SPEAR in 6.8x51mm highlights its impressive ballistics and energy output, exceeding 6.5 Creedmoor. While the 113-grain ball round did not penetrate a Level IV armor plate, it caused significant backface deformation. Accuracy with ball ammo was typical for military rifles, and recoil was comparable to .308.

The Sig SPEAR rifle chambered in the new 6.8x51mm cartridge, adopted by the U.S. military, is showcased. This review highlights its 16-inch barrel and impressive 80,000 PSI operating pressure. Future testing against body armor and ballistics gel is planned, with comparisons to 6.5 Creedmoor.

This YouTube video, "TOP 7 Newest Calibers Will DOMINATE 2025 - #1 Will Shock You!", focuses on the evolving landscape of ammunition, highlighting seven new calibers revealed at SHOT Show 2025. It discusses calibers like the 300 PRC, .21 Sharp, .277 Fury, 7mm Backcountry, and 338 ARC, emphasizing their performance, recoil management, and practical applications for various shooting scenarios including suppressed shooting, hunting, and lead-free zones. The video aims to inform viewers about advanced cartridge designs that offer higher pressure, better compatibility, and improved utility compared to older setups.

The Daniel Defense DDM4 PDW chambered in .300 Blackout is presented as a highly effective modern defensive tool. It features a 7-inch barrel, 20-round capacity, and is shown with accessories like a Trijicon RMR and Surefire Scout light. The .300 Blackout cartridge's utility in a PDW platform is highlighted, despite common misunderstandings, with a live-fire demonstration showcasing its effectiveness.

This video compares the 5.56 cartridge to the more powerful .30-06 Springfield, highlighting the latter's historical use. It features a Remington 742 semi-automatic rifle in .30-06, questioning the classification of traditional firearms as 'assault weapons'. Live fire demonstration showcases the rifle's performance.

This review details the AR-57 upper receiver, a conversion for the standard AR-15 platform chambered in 5.7x28mm. It highlights the unique top-mounted P90 magazine system and a clever downward ejection modification using a cut Magpul PMAG to catch spent brass. The demonstration confirms the effectiveness of this brass-catching hack.

The Ruger Mini-14, chambered in .223 Remington/5.56 NATO, is examined for its 'weapon of war' status. The review highlights its modularity, demonstrated by a quick stock swap from synthetic to wood folding. Live fire shows its capabilities, contrasting its public perception with other firearms.