Originally Posted by ranger_sxt
And what exactly does that do for you?
And again we are confronted with the frequent quotes of the Black Rifle and all it's "flaws".
Let me ask you this, would you take your bolt gun out of the case, loosen the action screws, say two turns, and start shooting for groups?
I am hoping you would say no to that question, since the very reason for those ( 2 ) action screws are to keep your barreled action securely in place in the rifle stock.
The part you hold, the stock, is not the part doing the actual work. The action being the part firing the bullet, the bullet entering the lands and grooves of the rifling, causing torque, which leads to harmonics.
If your action can jump all over the place in your stock, you are not getting the most stable shooting platform.
The same basic principles are found in the AR. If you remove the upper from the lower, as it was designed, and you put the upper in a vise and cinch it down good and tight in a safe and secure manner, it would be possible to send a round downrange. You would have to manually strike the back of the pin to set off the primer, and the bolt would probably come back halfway across the parking lot, but it would be possible to do.
The vise is the same as your front fore grip on the weapon, that is your only point of stability. The pistol grip, the stock into your shoulder and your spot weld on the stock itself are ALL part of the Lower.
Now, can you exert as much or more pressure than the vise in the scenario? I am going to say probably not, but there are some big boys out there, so who knows.
Basically this, from a pure, shooting platform standpoint, the better the mating between the upper and the lower receiver, the tighter the overall fit is between the two, the better overall accuracy you are going to get out of the weapon.
Is this as big of an issue today as it was, say, 10 years ago before AR Upper and Lowers were being mass produced with CNC driven production facilities?
Absolutely not. The receivers today are of a whole different breed of quality than those that could be had a generation ago.
Do you need one in an AR you built for CQB, where you stand in a doorway as a bullet hose with your C-Mag running full tilt? Again, probably not.
Then again, what if you are building a 20", bull barreled, 800 yard varmint slayer on a modest budget?
To categorically dismiss a part without examining it's application and what it actually brings to the platform is biased and unfair. To repeat a statement, and apply that across the broad spectrum of uses for the product is niave to say the least.
that builds a more stable shooting platform should be examined, and implimented, if you are building with an intent to focus on accuracy.
If you personally don't like them, great. If you have personally seem them disintegrate into a molding, crumbling mess that took a perfectly good AR and turn it into an expensive club, well, I'm sorry.
I just can't adhere to the blanket statement that they are a POS and should never