Madbull Daniel Defense MK12 12" M4A1 RIS II Airsoft CNC Aluminum RIS (Color: Black)

"It's a rail, and it rails. Buy a DD barrel wrench I guess

"Fits snug as a bug and looks awesome. Durable and lightweight (compared to the real one). However only flaw is that the color is a slightly bit more bronze than the real FDE but it’s an airsoft replica really. But for those of you who own a G&G Predator you will need to dremel the actual receiver so the alignment tabs and side screws fit, a lot

"Beautifully made rail. Every detail and specification is spot on. Required modification to fit a TM MWS GBB M4, but not excessive. Just a little grinding in order to hold outer barrel tight against the receiver, but well within what is usually expected. Accessories fit well on the rails, and the finish is exceptional. Worth the extra bucks.

"Pros:
Great build quality
DD trademarks
Easy to install
Relatively lightweight
Sturdy
All the rails you will ever need

Cons:
Pricey
Heavier than a drop-in rail system

All in all, it's a great cosmetic and practical upgrade. The quality is excellent, and the drawbacks are far outweighed by the benefits.

Fits great on my KWA VM4A1, so I can guarantee compatibility for that platform.

"I ordered this RIS to rebuild the USSOCOM M4A1 Block II.
This RIS is very well made and easy to build and attach to the upper reciever.
It's my second Madbull RIS and I love both of them.
You can easily attach things to it and it's very durable.

If you are thinking about buying one do it, you won't regret it!

_TheOperator_ out!
(You may know me from 9gag)

"This is well made and looks great. Only complaint is that you have to buy a G&P spec barrel nut separately and it is longer than the one that comes with it and is just too long by about 2mm so it is a bit tough to get the RIS to seat back against the ring that secures it without either modifying the nut or the corners of the RIS that touch it.

This problem will not exist for non-G&P threaded guns as the included Nut is shorter.

"WOW! this rail system is so versatile and great! i just got mine today, and to be honest, i was a little bit shocked. First to start with the one and only CON: the color is more of a brown. it doesnt even much resemble dark earth or FDE for short. other than the color, i was blown out of my chair by this product! A bit expensive, but all worth it. im not an extremely large player, I am only 5'10 150lbs, but my arms are very long, and this rail system is the most comfortable position wise, for my arm, especially with a foregrip near the front end. it looks completely amazing and i promise you wont regret this purchase! I hope this review helps

Cons:near a brown copper color
Pros: versatility, length, strength of material, rail space markings, real estate for accessories, removable lower half for barrel mounted grenade launchers.