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Fitting CAA handguard

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I have a marui M4A1 and I have just purchased a CAA M4S1 handguard, I hoped that it would be a simple straight swap, however, as with all things, it is not that simple.

Would anyone know what I need to get this thing attached properly and can you recommend specifics.

Many thanks

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First things first - does the Marui Delta Ring have teeth or just a couple of lugs? I'm going to assume the latter and say that you'll need a new Delta Ring. You're probably going to need a new handguard cap too as the plastic one on the TM is too bulky to fit around the front end of the new guard.

 

http://www.fire-support.co.uk/product/king-arms-delta-ring

http://www.fire-support.co.uk/product/kingarms-handguard-cap

 

Once you have those, you'll need to remove the old delta ring which can be a bit fiddly due to the three part design of the inner barrel - you'll need to remove the small hex hed screws that hold sthe barrel together to get the nut off. You'll also need an armorers wrench to fit the new one properly.

 

http://www.fire-support.co.uk/product/guarder-extra-heavy-duty-armorers-wrench

 

You may also need a small washer to help fit the hand guard cap - the TM one is held in place by a tiny screw in the back face of the sight, the hole for a similar screw in the KA cap is much bigger!

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Spot on! You are a gentleman and a scholar. Woop!

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You're welcome, I went through this very voyage of discovery fitting a Magpul MOE hand guard to my TM M4A1. Anything else you need pointers on just ask!

 

While I think of it - don't forget to thread the battery wires through the delta ring BEFORE you put it all together. Voice of experience.

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My CYMA doesn't have a threaded upper. Will it go on at all? If not I'm not too bothered because it's a shit gun anyway. I will sell it as soon as I can afford a new rifle.

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My CYMA doesn't have a threaded upper. Will it go on at all? If not I'm not too bothered because it's a sh*t gun anyway. I will sell it as soon as I can afford a new rifle.

 

I hate to say it buddy but I think you're donald ducked on that one. All the aftermarket handguards of a Magpul/CAA style I've seen are designed primarily for the real steel market so they expect a real steel style delta nut to hold it all together.

 

If you just want to add rails to a standard handguard there are ones designed for that very task: http://www.actionhobbies.co.uk/M16-AR15-M4-Hand-Guard-Base-Rail_AWWG4.aspx#.U3oyQPldWSo I had one like this on my original handguard until I swapped mine out for the MOE guard (and the delta ring and all the other bits and pieces need to make it fit).

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