OK I admit it I am an AR DumbA$$

[Jackie Graham]

I recently started my first AR15 build an I here alot about Mil Spec parts but I do not know the difference between. I picked up a Spikes lower but want to determine if the buffer, spring and tube are Mil Spec. I don't want to go but Mil spec replacements if I already have them. How can I tell?

 

[jkaczyn18]

The spring and buffer should be mil spec and an easy way to tell if the buffer tube is mil spec is to see if the end of it(the end that isn't threaded) and see if there is a slight slant. Mil spec tubes don't have the slant but commercial tubes are a tiny bit longer at the top.

 

[sovietak474u]

The spring and buffer should be mil spec and an easy way to tell if the buffer tube is mil spec is to see if the end of it(the end that isn't threaded) and see if there is a slight slant. Mil spec tubes don't have the slant but commercial tubes are a tiny bit longer at the top.

What he said

 

[MYCAR47562]

http://operatorchan.org/k/arch/src/k233005_k187093_ctrcommeciavsmilspec.jpg

measure the tube

 

[RIDDLE]

The spring and buffer should be mil spec and an easy way to tell if the buffer tube is mil spec is to see if the end of it(the end that isn't threaded) and see if there is a slight slant. Mil spec tubes don't have the slant but commercial tubes are a tiny bit longer at the top.

Yep that is the easiest way to tell.

 

[potenza]

Spikes lower prob military spec

 

[dawgm]

Here is some light reading for you:

https://docs.google.com/spreadsheet...Hdzd2hlZ2hOUXNFdUVoakZ3UHJnVEE&hl=en_US#gid=5

https://spreadsheets.google.com/spr...akp2a3Y2NjMxTEE&single=true&gid=2&output=html

 

[Jackie Graham]

Thanks guys for the help. I will check it out tonight.

 

[jmedic25]

I dont think Spikes sells commercial tubes.

 

[Jackie Graham]

OK I checked and the lower is Mil-Spec. Thanks to everyone that replied for saving me some change!