[Quick Karl]

I am in the process of building a Mark 12 SPR clone and I wonder if anyone might know what the exact gas port location and diameter might be?

I have a Schneider SS 7-twist 5-poly barrel blank and I thought it would be one heck of a lot easier to ascertain this critical dimensional information, so if anyone can point me in the right direction I would be eternally grateful.

[blackhawk2000]

Try www.ar15.com

[Quick Karl]

I've had poor experiences on AR15.com

[mikeyonthemadone]

http://www.m4carbine.net/forum.php


Mikey

[Quick Karl]

Thanks Mikey,

I'll see if I can dig up the info there.

[Quick Karl]

After making a few phone calls and begging, I believe I've gotten the info - but if I tell you where I got it, I'd have to... :neener:

After talking to a very fine gentleman at a well-known precission AR-15 company, I drew up this schematic.

http://i138.photobucket.com/albums/q248/karlar58/MARK12SMALL.jpg

[TexasRifleman]

Wow, very interesting.

You GOTTA post some pictures.

[Quick Karl]

This is a MARK 12 SPR:

http://i138.photobucket.com/albums/q248/karlar58/MARK12SPR.jpg

Only I won't be needing the suppressor for shooting holes in paper.

[TexasRifleman]

This is a MARK 12 SPR:

Pictures of yours as you build it too I mean, sounds like an interesting project for sure.

[DMK]

Interesting. I'd love to see a 20" with that profile, maybe with a slight taper under the handguards.

[Quick Karl]

Here is what I have so far:

http://i138.photobucket.com/albums/q248/karlar58/MARK125508.jpg

Also have a Leupold Mark IV 4.5-14 x 40 PR Matte Mildot scope not in the photo.