Matrix 2-Piece Drop In Rail System for M4/M16 Airsoft Rifles (Length: 12")

"this fits perfect for my kwa carbine!

"Pretty good piece of kit. Requires the real steel style delta ring for proper fit. The pieces are definitely rigid and the finish is pretty nice. It is not terribly wobbly when assembled, but I did add some duct tape in the groove where the delta ring teeth go and now it is rock solid. The relatively soft heat shield is riveted to the inside of the bottom half of the hand guard and doesn't seem like it was meant to be removable if you wanted to do that. The heat shield also has grooves that partially grab the inside of the upper half to improve stability. Overall I am pleased and it is great for that classic M4 RIS look at an affordable price. Would recommend it.

"Excellent piece of equipment. Fit perfectly on a we m4 gbb with no wobble whatsoever.

"This is a high quality product that has exceptionally little wobble (at least on the KM4A1 I installed it on). After going through two other RIS' that didn't fit, this is the third time charm that worked, and I am more than convinced that I got my money's worth.

Pros:
High Quality
Durable
Functional
No Wobble

Cons:
Tight Fit
Lack of Cons to constitute an entire list

"An overall great RAS for any M16. It says here that it comes with rail covers & that the delta ring is not included, but in my case it's the other way around. I can't complain though. I needed that delta ring in order to fit it onto my ICS M16, since the stock one won't accept the standard RIS/RAS systems that require the Real Steal style.

Pros:
-Great Enhancement for ANY M16 length AR-15. Models the M5 RAS on the M16A4 RAS's that are used today.
-Tons of rail space.
-2 Piece rail system. Remove bottom rail to attach a Grenade Launcher directly to the barrel for increased stability.
-Shockingly light. I expected to gain about another 3-4 Lbs. after switching from the stock Plastic handguards on my ICS.
-Great build quality.
-Great, clearly visible laser etching with rail slot location things.

Cons:
-Rail Dimensions are a bit smaller than mil-spec, so you might have your accessories wobbling. I have a vert grip that works fine though, but my scopes & other sights won't stay still. I'll have to see how my rail covers stay once they come in with my next order.

"this is a good RIS. it is rele solid. if u have trouble getting it on i know u should put in on with the barrel facing the floor. i tried it for and hour(barrel up) and then i finally asked my dad to do it, and he did it in a second with the barrel facing down. But over its a good RIS.

"this RIS is fantastic i got it in yesterday and i'm very pleased on the build quality and and very satisfied with the fast shipping i would highly recommend this RIS if you have a need to get a RIS. the only thing that i had an issue with is the fact thatyou need a real steel delta ring but those r very cheap

"I got this about a month ago and it is wonderfull. It is actually made by dboys, which makes okay guns and great externals. It will fit on a classic army guns and others that use real delta rings. It was a pain in the but to put on but after tinkering around with it I finally got it in. It is solid as a rock, no wobble at all.

To install it you pull the d ring back and put the top part in first, then the bottom.

Overall great ris unit!

Thanks EVIKE!!!

"If you are planning to add RIS to your M4, a good alternative is the Matrix jungle series free float. Its much less wobbling and solid.

"The rail itself is very high quality for being Cyma accessories, and the markings are laser engraved and look very close to a real M5. Be careful which M16 you're adding it to however, I originally bought it for a G&G M16A2 and it took too much work to mount it to have it terribly loose on the rifle. However I added it to my G&P M16 slabside and it fit perfectly, even without adding the included delta ring which is wider to accommodate the rail. It would fit even better with a more modern M16 with the A2 style handguard mounting hardware. I would say if you're interested in the rail make sure the M16 you have is closer in design to the G&P in terms of dimensions at least. I'd give it a decent 4/5 as long as it mounts properly, and in already planning on buying another for another rifle build

"This RIS unit is by far one of the better I have purchased. The C&C aluminum body is not only impact resistant, but looks great as well. Then only thing I found to be wrong with it, is that on some M4's with a one piece barrel and gas tube it does not fit properly under the delta ring. A fix for this problem is to simply tap the unit into place with a rubber mallet and weld it into place. This may sound extreme, but it is the best way to ensure that the RIS will properly stay in place. Otherwise the RIS will become unseated in the delta ring and fall out of place. 3 simple tac welds on both sides of the RIS will ensure a perfect fit, enabling you to attach a foregrip or M203 safely and properly. Once welded on, this thing worked great and looked perfect.

"This is not the Classic Army RIS system it is Echo 1 and it barely fits, it's a little too long. I had to file part of the bottom rail in order to get my delta ring on my CA M15A4 proline to go over it. now that it's on it is really tight (no wobble at all). but putting the bottom rail back on after taking it off for ANY reason is extremely hard to do. It's a good rail, just not what i was expecting.

"Its a decent rail system. I bought it for my G&G M16. As of now, it still isn't on my gun, After a few hours of messing around with it, I've determined that it disagrees with a mock gas tube. I pulled the gas tube off my gun, and the rail fit. With the tube in, it does not want to seat properly into the delta ring. It's a good rail. Nice markings, light weight, and good finish. Unfortunately, the rail doesn't seem made for rifles with a gas tube. Also, the package does not include rail covers. Not a big deal given that the rails aren't sharp at all.

Pros:
Lightweight
Clean markings
Nice finish
Rails aren't sharp

Cons:
Actually does not include rail covers
Does not accept a gas tube properly (at least for my G&G)
Installation is unnecessarily finnicky

"no it will not fit batteries. it is a two piece. eventually you will have to tighten it every day to keep from wobbling

"Unfortunately I listened to another reviewer that said all you have to do when putting this rail on a G&G combat raider was to remove the mock gas tube. 5 days after it got here I have still not gotten it on here, with the help of a master machinist and a full array of tools. I had to drill holes, use a lathe to mill off about a half an inch and to mill down my outer barrel. I still need to modify it more to make it work.