View Full Version : MI low profile gas blocks on sale

06-08-2007, 7:01 AM
I am overstocked on these Midwest Industries low profile gas blocks so I have them marked down to $34.99 to move them out.



06-08-2007, 7:38 AM

how will i know if it will fit my barrel? how do I measure it? :confused:


sorry forgot to add that it is a dpms m4 profile barrel.

06-08-2007, 8:45 AM
Thanks! This will go great for my new precision AR build along with a BB and BB release kit.

This block will fit your barrel if it's not pencil thin (.625) or a bull barrel (.925) I think those measurements are correct. .750 is the most common barrel diameter you'll come across. You can try taking a ruler and measuring the diameter or wrapping a string around your barrel and measuring the circumference. If you use the string method, don't forget to divide by 3.14159 :cool2:

06-08-2007, 8:58 AM
thanks dude :kest:. That's what i get for saying i'll never use this stupid stuff in math class when i was younger :wacko:

06-08-2007, 1:43 PM
A decent pair of calipers is a good item to add to your toolbox. A simple dial caliper from Home Depot can be had for around $12 - $15. The digital ones are cool though, if you want to spend a little more. The string divided by pi method is definitely cheaper :D

ar15barrels.com has some nice barrel profile specs and diagrams: