Buffer tubes

[mr.bean]

Hey guys, I am looking at a Magpul CTR Stock for my rifle and i am not sure how to tell if i have "mil spec" or " commercial" ? I have a RRA Questar stock on now. Thanks

 

[Questar]

Hey guys, I am looking at a Magpul CTR Stock for my rifle and i am not sure how to tell if i have "mil spec" or " commercial" ? I have a RRA Questar stock on now. Thanks

Rock River stocks use Commercial Tubes. Our Questar 6 position stock also uses Commercial tube. It sounds like you probably have a commercial tube on your gun now... so you'll need a "Commercial" version of the CTR stock.

The other alternative is to buy a "Mil-Spec" diameter extension tube and replace the one you have on your gun now... but that's really not necessary and seems like an unnecessary expense.

Mark

 

[Hungry]

I'm with Mark (Questar) on this one. I discovered that my tube was commercial and ordered the correct Magpul CTR buttstock for the right sized tube. Did not bother buying a milspec tube and then a milspec CTR buttstock, seemed like extra money out the window when I can use it for practice ammo! Save yer money!



Barney

 

[Demon971]

Best advice, considering the differences between the mil-spec and comm is marginal.

 

[Raytheon]

I agree with Questar and Hungry. RRA uses commerical buffer tubes so get a commerical sized CTR.

If you want to be sure:
Mil-Spec - 6-7⁄8” (17.5cm) OAL, 5¼” (13.34cm) high. Fits fits mil-spec 1.14" O.D. carbine buffer tubes.

Commerical- 7-1⁄8" (21cm) OAL, 5¼” high. Fits 1.17” O.D. commercial carbine buffer tubes.