SIG MP7? Check out this MP320 Chassis

This guide details the process of building an HK UMP45, focusing on the use of HK parts kits and aftermarket receivers like those from S5 Tactical and GDI 3D. It highlights the benefits of an enhanced recoil spring for suppressed shooting and the ease of installing a pre-assembled drop-in lower receiver. The UMP45 is presented as a viable, albeit often overlooked, platform for home defense due to its manageable recoil, magazine capacity, and suppressed performance.

This guide details the process of building a civilian-accessible clone of the rare HK 416C PDW. It emphasizes using specific reproduction parts from manufacturers like Illinois Precision Machine (IPM) and HK Parts, while highlighting key differences from original HK components and addressing potential compatibility issues, such as magazine fitment and BCG interaction with FRT triggers. The build focuses on achieving a high degree of visual and functional fidelity to the original 416C.

This video features LFD Research detailing their investigation into uncommanded discharges of the SIG P320. They demonstrate how specific part combinations, tolerance stacking, and manufacturing variations can lead to the firearm firing without a trigger pull. The discussion highlights potential design flaws and the importance of understanding firearm mechanics for safety and reliability.

This guide details the process of modifying a B&T TP9 into a Short Barreled Rifle (SBR) configuration, including the installation of a proprietary suppressor, Aimpoint ACRO P-2 optic, and other accessories. The video highlights the challenges and benefits of these upgrades, offering insights from firearms expert Colion Noir.

This video details the resurrection of the Colt MARS (Mini Assault Rifle System) program by Centurion Arms. It covers the historical context, the unique 5.56x30mm MARS cartridge, and the intricate process of reverse-engineering and manufacturing these rare prototypes. The expertise of Chris Bartocci and Monty LeClaire highlights the engineering challenges and the platform's potential.

This guide details the technical modifications involved in the Colt MARS PDW project, a miniaturized M4 variant chambered in a unique 5.56x30mm cartridge. It highlights the extensive part alterations, including receivers and internal components, and explains the rationale behind Colt's decision to shelve the project. The revival by Centurion Arms is also noted. Instruction is provided by Chris Bartocci, a recognized expert on the AR-15/M16 platform.

This video from TREX ARMORY, featuring Lucas Botkin, critiques the trend of over-accessorizing firearms, particularly the Sig Sauer MCX. It highlights how excessive attachments can lead to impractical setups, especially for users who engage in high-volume training. The discussion focuses on the heat transfer issues associated with aluminum foregrips and the potential redundancy of certain mounting solutions.

This video from TREX ARMS focuses on maximizing value when purchasing an AR-15, emphasizing performance per dollar spent over simply choosing the cheapest option. Instructor Brandon highlights key components like upper receivers, lower parts kits, triggers, and optics, recommending specific brands and configurations that offer the best balance of cost and capability. The discussion covers different AR-15 roles (CQBR, SPR, GPR) and illustrates the concept of diminishing returns in firearm component upgrades.

This guide details the assembly of a budget-friendly AR-15 rifle, focusing on cost-effective component selection without compromising core functionality. The build prioritizes investment in critical parts like the barrel and BCG while saving on furniture and lower receivers. It highlights performance data, including accuracy with various ammunition types and the impact of heat on sustained fire accuracy.

This video provides a critical review of a $220 Chinese clone of the Vortex Razor 1-6 HD II. Lucas Botkin, an established firearms industry influencer, details the clone's significant performance shortcomings, including poor illumination, turret wobble, point-of-impact shift, and failure to hold zero under recoil. The review emphasizes that the clone is a poor value compared to the genuine article or even quality red dot sights.