Specially developed on request from the USMC, the A5 Combo Kit stock configuration was developed specifically for the future upgrade on the M16A4. If adopted, the newly revamped rifle might be designated as the M16A5.
The patent pending Vltor A5 configuration stock kit is not just an EMod stock with M4 components; it's developed as a completely new operating system. For example, the receiver extension is longer, housing a longer and specially weighted buffer, utilizing the M16A2 action spring. The A5 receiver extension features seven adjustment positions. When totally collapsed, the EMod is at the same length if mounted to any carbine length (M4) receiver extension. When totally extended (in the seventh position), the EMod can extend to a longer length of pull than an M16A2 stock assembly.
Recently tested by a professional source, the A5 system has proven to be more reliable then the M16A2, M4 and the recently released H6 stock systems. With the use of the M16A2 action spring, the A5 system resembles the reliability and performance of the M16 fixed stock system. By having the same characteristics of the M16 fixed stock system, the A5 has shown increased accuracy and milder/smoother function, due to the constant spring rate the M16A2 spring offers. To reiterate, the A5 system offers everything the M16 fixed stock system offers, but with increased reliability and performance.
The A5 system is a superb upgrade for piston systems. Piston equipped ARs, are usually over-gassed and show excessive carrier velocities, which can lead to unreliability and decreased accuracy. As tested on numerous piston systems (such as the HK 416 platform), the A5 system has tamed such platforms and reduced the weapons rate of fire while retaining, if not increasing, the weapons reliability. Also available for the A5 system are two heavier weighted buffers for the weapon or shooter with special needs. Each heavier buffer upgrade is offered separately, but not in kit form.
To sum it up, all AR based platforms will benefit from the A5 system. If accuracy and reliability is what you desire, then the Vltor A5 system is what's required.
Kit includes: VLTOR A5H2 buffer weighing 5.3oz and rifle spring, seven position receiver extension, lock plate, lock nut and VLTOR EMOD stock