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Just built a 9mm AR. I have a 16inch standard upper (in 9mm), a spikes lower with a STANDARD (.223) parts kit.
I added a magwell/block and am running a magpul MOE stock with a 9mm buffer.

Do I NEED a 9mm hammer or will the regular one work?
* note, I have the rounded style hammer example below:

what kind of carrier?

ramped.
I think it is this one.
http://www.jsesurplus.com/9mmrampedbott ... embly.aspx" onclick="window.open(this.href);return false;
edited to add, that link says either hammer will work, but I have heard of people having problems when not using the correct hammer.. just wanting to check

If it ramped the 5.56 hammer should work fine.

JeepGuy79 wrote:If it ramped the 5.56 hammer should work fine.

My bolt is not ramped and I have a standard hammer in mine. It runs like a champ with the mag well adjusted properly and quality mags.

Thanks to you two!

I am running the $45.00 promag mag-well block and 32rd promag... hope it works.

new question, can anyone elaborate on bolt travel? I have heard the bolt travels farther back and some people place quarters? in the buffer tube to decrease travel?? what is that about?

RSJ wrote:new question, can anyone elaborate on bolt travel? I have heard the bolt travels farther back and some people place quarters? in the buffer tube to decrease travel?? what is that about?

That sounds like a bad idea and the wrong buffer or spring installed. I don't put any foreign objects in my weapons that are not supposed to be there.

blowback or gas?

JeepGuy79 wrote:blowback or gas?

dont see a gas tube, looks like blowback

Some people say that the bolt overtravels in a 9mm so they put about a 1 1/4" worth of spacer of whatever sort in to control it. Some people just use a 9mm buffer and a factory spring and say it isnt an issue. Personally I have set up one with an extra power spring and a heavy buffer and about .8" of spacer and came out well. Your setup might vary.
I see it is a .223 lower. Why don't you call spikes and see what they recommend?

I like that magwell. Nice collection.

Thank you!
The magwell is from promag, hope it works well... only $45.00 worries me. All the others are >100

http://www.spikestactical.com/new/z/low ... p-174.html" onclick="window.open(this.href);return false;



only $14.95, I would get one.