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1/25/2018 7:38:29 AM
Posted: 3/14/2006 4:38:04 PM EST
I'm looking into building my first AR, i have friends here locally who have ALL the tools needed to do so and can give me a hand through the process.

I was looking at striped uppers and found one that had an option for an 'M4' Cut Upper. is there any differnce between the M4 Cut Uppers and a Standard? and if so what is the differnce? i was thinking of building a Dizzy and not using a M4 barrel if i dont need to.

Link Posted: 3/14/2006 5:41:26 PM EST
If you use a upper reciever with M4 ramps cut in it you must use a barrel with M4 ramps as well. You can use a barrel with M4 ramps with a standard upper and be fine. You cant do it the other way.

Good Luck!

Link Posted: 3/14/2006 6:07:25 PM EST
Thank you thats just what i needed to know...

Link Posted: 3/14/2006 10:32:39 PM EST
there are M4 feed ramps and M4 profile barrel

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