Rifle RE 6061

[praythenspray]

Hey all,

I am starting to piece together parts for a second lower and I am debating about going with an ACE stock with the tube and other parts sourced from BCM. I noticed that in the description from Bravo, it states that it is 6000 series aluminum.

Considering the Mil-Spec carbine and A5 tubes are 7075-T6, I guess I assumed that the rifle RE's would have been 7075-t6 as well. I am guessing because it is on a non collapsible stock it is not an issue?

Just curious why the difference.

[556Cliff]

Thank you for pointing out that Bravo Company has finally admitted that their rifle receiver extensions are not "Mil-Spec".

Not long ago if you emailed them asking weather their rifle receiver extensions were 7075 or 6061 they would just email back that they are "Mil-spec".

This means that Colt is the only game in town for 7075 aluminum rifle receiver extensions.

https://www.bravocompanyusa.com/Rece...16%20rifle.htm

[lysander]

It shouldn't be an issue. You're as likely to crack the wrist of a wood stock as bend a 6061 tube.

[556Cliff]

It shouldn't be an issue. You're as likely to crack the wrist of a wood stock as bend a 6061 tube.

I would be more concerned about possibly stripping the threads for the upper stock screw than bending the tube itself.

[lysander]

I would be more concerned about possibly stripping the threads for the upper stock screw than bending the tube itself.

If you torque it properly, this is a non-issue. About 40 in-lbs.

[Rifleman_04]

disregard. Reading comprehension fail.

[556Cliff]

If you torque it properly, this is a non-issue. About 40 in-lbs.

I have never actually used a torque screwdriver on the stock screws but if I did 40 in-lbs sounds about right.

[Benito]

WTF?
If true, that's definitely not cool.
Mil-spec implies milspec.

Where did you see confirmation that BCM uses 6061 for their REs?

http://www.brownells.com/rifle-parts...prod72455.aspx
https://www.bravocompanyusa.com/Mils...milspec-re.htm
Both these explicitly state 7075 T6

EDIT: Damn it, just saw you were talking about RIFLE receiver extensions.
My bad!!!!!!!!

[acrocat]

Bad reading comprehension on my part ***

[tehpwnag3]

I have a BCM rifle RE and I happen to have a ACE stock installed on it. The coating is a glossy anodization which is very smooth in operation and makes it easier to slide the foam on (which is notoriously difficult without lube or compressed air). I like the setup but wish the ACE stock had a better sling mounting solution, like a QD socket. Overall, it's strong and lightweight.

As for not being Mil-spec, that is a bit concerning but not overly-concerning. I thought the price was excellent and the Colt kit was going for like $100??? so I thought WTH.