Adams arms 5.45x39 upper

[GunsTrader]

I recently acquired an Adams Arms upper chambered in 5.45. I want to replace the stock hand guard with a quad rail. I thought I'd save a few bucks and buy a cheap aluminum rail, but when I took off the stock hand guard I found out that the gas tube is a lot larger on it than on my others.
Can anyone tell me which hand guard to get that would fit over the gas system tube that Adams Arms uses?

 

[user 71]

Samson makes a hand guard specifically for AA uppers.

 

[Hayata]

They have a list of models that fit on their website.

They also have a schematic showing proper dimensions if you want to modify your own.

http://www.adamsarms.net/faq.php

 

[GunsTrader]

Thank you guys for the help

 

[vinhtvu2]

The Adams Arm one is piston driven isn't it?

 

[Zombie]

They have a list of models that fit on their website.

They also have a schematic showing proper dimensions if you want to modify your own.

http://www.adamsarms.net/faq.php

Yeah this website is great.

It is wider because its not a gas tube, its a piston because those are piston driven (at least mine is). You can put an MOE handguard on there, or pick one from this list.

 

[vinhtvu2]

You should just trade or sell me this upper and save you the headache of getting into ANOTHER caliber :-P

 

[Hayata]

Mine is on a New Frontier poly lower.

Randomly throughout firing a mag a round would jam in the chamber. I didn't figure out what was going on until I let a friend shoot it.

The spent rounds would randomly bounce off of the shell deflector and go back INTO the chamber! I only shoot surplus ammo in this gun.

Switched to an H2 buffer and haven't had a malfunction since.

 

[vinhtvu2]

I have the M&P15R 5.45x39 upper on a New Frontier Poly Lower. That trigger was glass-breaking awesome! Now I have it on a S&W M&P-15 Magpul MOE lower. Just because I'm anal and like matching guns.
If you want to trade your Adams Arm upper for my S&W M&P15MOE upper, it's 5.56/223 :-P I'll build another 5.45x39 AR.