MP5A4

[MatthewTyson]

Quoted directly from the MS-TAC forums


My beauty. My precious. My mistress. I've dumped somewhere between $700 - $800 into this gun, gone through heaven and hell to make it live, and now, I'm selling it for $500. Why, you might ask? Variety of reasons actually.
1) My budget is too constrained to be comfortable at the moment.
2) I am not selling the grenade launcher or the SAS, so I'm still going to have guns.
3) I want to build an AES (Automatic Electric Shotgun), and I need a budget for it.

Specs:
Base gun: CYMA CM041B (aka MP5A4 / MK5A4)
Systema Energy (M120) Series Complete Mechabox with standard-ratio helical gears
Systema Energy Motor(equal in power to a Systema Turbo, but with ~ 20% better energy efficiency)
Madbull 9.6V LFP Battery (40C discharge rate, ~1800 MAH). Special charger included.
Prometheus 6.03 Precision inner barrel for MP5A4
I managed to tear my bucking when I was changing barrels the other day, so the gun currently has the stock hop-up bucking and nub, once I get a chance I'm upgrading to an SCS nub and a systema bucking.
Custom modifications:
Full stock is dremeled to accept large-type batteries and a 12.8V LFP (thicker but not as long as a large type).
Entire gun and battery are wired to deans.

[MatthewTyson]

For consistency, I am recreating the post:

MP5A4 and gear: $500

I've spent a lot of time, money, and energy on making this gun a killing machine, and it has caused me nothing but grief and despair until just recently. With the help of several AM members, this gun has become awesome like nobody's business. I have played with it in it's current condition for a single 6-hour game, and it performed its intended role of being a bb-laser (350 FPS w/.25g biovals, 30 RPS)

Note: The gun has a slight overspin and as such I am including my custom little tool for unlocking the anti-reversal latch to release spring tension after a game.

Base gun: CYMA CM041B (MP5A4)

External Upgrades:

• AMP Micro reflex site on high-rise mount
• Magpul AFG (Angled Fore Grip)
• Madbull 9.6V LFP Battery (40C discharge rate)
• Madbull gemtech "Blackside" barrel extension

Modifications:

• Extensive dremeling to frame and stock to house upgraded components
• Gearbox and battery wired to deans
• Custom-mod to hop-up for rigidity

Internal Upgrades:

• Systema ENERGY series drop-in complete mechabox (m120 spring) with perfectly-shimmed helical gearset
• Systema ENERGY series motor (think turbo with 20% better energy efficiency)
• Prometheus 6.03mm tightbore barrel
• Bravo bucking/nub

Included Gear and Goodies:

• 3-point sling, unknown brand
• Pistol Belt with 2x triple mp5 mag pouches
• 5x 70-rd midcaps, unknown brand
• 1x 200-rd highcap, unknown brand
• small jar of systema cylinder grease (unopened)
• adjusting screwdriver to micro reflex sight
• custom unlock tool (see video when i post it)

Also, I have videos with the details of the gun and gear: