What is the Most Sturdy AR Lower ? ? ? ? ?

[tombogan03884]

 Rastus, the Upper you are looking at would work even on a Carbon 15. Since it is a Bolt action the only stress points are the take down pins. You do not need to worry about the type of fractures seen in Billt's post on the Umarex .22's

[Rastus]

Rastus, the Upper you are looking at would work even on a Carbon 15. Since it is a Bolt action the only stress points are the take down pins. You do not need to worry about the type of fractures seen in Billt's post on the Umarex .22's

Thanks Tom.  I have only half thought this out still being in the slobbering and lustful phase of this long-term wishful project.

[billt]

There are several manufacturers of .50 BMG uppers for the standard AR-15 Aluminum lower. Bohica and LRS come to mind. I'm sure there are many others. If you go on any of the .50 cal. forums it's doubtful you'll find a thread about anyone experiencing a cracked lower from their use. If a standard AR-15 lower can take a .50 BMG sitting on top of it, I'm sure it will be plenty strong for any other caliber.  Bill T.

[MikeBjerum]

Rastus,

Not ripping your choice, but why are you looking at uppers for an AR?  I've been eying the Barrett 99 for a looooooooooooooooooooooong time, and after someone else went with an upper on an AR I compared again.

[GUNS-R-US]

Rastus, the Upper you are looking at would work even on a Carbon 15. Since it is a Bolt action the only stress points are the take down pins. You do not need to worry about the type of fractures seen in Billt's post on the Umarex .22's

Like Tom said, the lower's don't partake of the stress in the AR design. Your more likely to break than the lower is.

Though if your rich beyond your wildest dreams you could contact a custom house like wilson to build you one out of Titanium. Though the design doesn't really leave much room for thickening the connecting pins without modifying the upper too.

[Sponsor]

[GUNS-R-US]

I was just looking at Barrett's web site and the model 99 uses an Aluminum receiver.

[tombogan03884]

  Could always Do It Yourself  

http://www.cncguns.com/downloads.html

Fixturing and progrm will not change based on material but you will want to play with spindle speeds and feed rates. 

[fightingquaker13]

 Could always Do It Yourself  

http://www.cncguns.com/downloads.html

Fixturing and progrm will not change based on material but you will want to play with spindle speeds and feed rates. 

Tom
There's a difference between DIY and WTF.
FQ13

[tombogan03884]

 Don't let it intimidate you FQ, It's no different than manual machining, you just communicate with the controls a different way.
Think of it like guiding a blind person down a hallway, in manual mode you put your hands on their shoulders and steer them, In CNC you direct them by text messages  
Other wise the hardest part of machining is figuring out how to most securely and efficiently fixture the work piece.

[Rastus]

Rastus,

Not ripping your choice, but why are you looking at uppers for an AR?  I've been eying the Barrett 99 for a looooooooooooooooooooooong time, and after someone else went with an upper on an AR I compared again.

No paperwork on upper, lowers easy to find around from individuals with the sucky economy.
$2,600 +/- vs. $4,000 +/- buys most of the scope.
0.5 MOA

I could be wrong, but I don't think I need magazine feed...single shot should be fast enough.  If I thought I wanted a mag I'd probably be thinking Barrett 99.  But then...I am still in the slobbering lust phase waiting on the Rock River LAR-8 varmint to come in along with paperwork to use the threaded 24" barrel coming with it.  All that MAIG talk where Bloomberg and BHO got together has me spooked early.   At least I know I can get the LAR-8 right now in the next week or so.

If the lap dog Holder (or some other Administration minion) starts spouting the Bloomberg mantra, I'll be grandfathered...I hope.  I'll also jump on that credit card and get the upper before I can think twice.  Come to find out...some guy about 20 miles west of here in Hominy sells the 416 machined brass bullets on Gunbroker...must be a sign.