Beowulf .50 AWS Right
Click for larger picture (Right side view)

FACTS
 Brand  
 MakeAlexander Arms
 Model.50 Beowulf (AWS)
 Method of operation  
 Semi AutomaticGas, Rotating Bolt
 Trigger1 Stage
 Feeding SystemSingle Stack box magazine
 Technical 
 Weight~8.8 pounds
 Width2.44"
 Height8.58"
 Overall Length35"
 Barrel Length16"
 Twist Rate1:19"
 Advanced Weapon SystemFree floating Barrel & quad rails
 Functionality
 Bolt position when firedClosed
 Bolt upon last round firedOpen
 Magazine capacity4, 7, 10
 Decocking or Dry fireDry Fire
 Field Stripping  
 Tools requiredNo
 Small parts retained or looseRetained
 Ammunition  
 Caliber.50 Beowulf
 Energy @ Muzzle2,678
 Velocity @ Muzzle1,900
 Grains334
Beowulf
Click for larger picture (Left side view)
Opinions
 Method of operation  
 Stoner Direct Gas System very simple system however its can get hot and dirty.
better get some gun scrubber aerosol to clean the gas tube and if you can find them some very long pipe cleaners
 Functionality  
 PriceHigh
 AvailabilityLimited
 Modularity / AccessoriesVery Good
 AccuracyVery Good (25-200yards)
 ReliabilityGood
 Ease of field Stripping  
 Very good, No tools required
 Ergonomics  
 The pistol grip make this rifle very ergonomically even though it is not reversible.  Left handed shooters will have spent shell casing deflecting in front of their face.  The addition of Ergo Grip, Ergo Grip Gapper help make it a very comfortable system.
The free floating quad rail also allows you to place lights, sling mounts, forward grips pretty much where ever you want.  I also added Ergo Grips low profile rail protectors that not only protect the rails but also your hands.
 Sighting System (Optics)  
 Just like the entry model I have added a Trijicon TriPower and a 1/2 raiser.
I found that using the 334 Rainer rounds are the best.
50 yards =  -0.16
100 yards =  0.0
125 yards = - 1.10
I find that the effective range of the rifle being at the 50-125yrds works well with the none magnified TriPower.
 Ammunition  
 PriceHigh
 AvailabilityRare
 PunchOne of the biggest punches around
 Links  
 http://www.alexanderarms.com/beowulf.htm
 http://www.trijicon.com/user/parts/parts_new.cfm?categoryID=11
 http://www.gunblast.com/50Beowulf.htm
 http://www.gunblast.com/Alex_Overwatch.htm
 http://www.gunblast.com/BFR-50Beowulf.htm
 http://www.50beowulf.com/
Beowulf
Click for larger picture (Logo view)

 My ramblings (Over all feelings; Why this Gun; is it worth it):

 I will update the page once I get a chance to do some real long range shooting with this particular rifle.
So far I have just done the basic functional tests and the by the book barrel break in procedure.  I didn't want to waste any time scoping it in until the barrel was properly broken in and I wanted to make sure the optics wouldn't shake loose.  One thing about bore sighting a 16" .50 cal is when you look down the barrel you pretty much see the whole landscape and your not really sure how well its sighted in.  You can therefore imagine how surprised I was when at at the end of the barrel break in procedure and the begging of the functional tests that I was hitting my short range targets in double and triple taps.  I will do the long range distance report within a few weeks and I am anticipating to be very good.

Additions:
Trijicon TriPower
1/2" raiser
Sling
(comes with very nice soft sided tactical case)
Ergo Grip: Right Handed Suregrip Grip, Gapper, Rail Protectors, and Rail Slide Mount
M3 light
Forward Grip
Cleaning kit
Reloading Dies

Forward Grip:
I have played around with forward grips on many guns and never been pleased. This rifle however works very well with a forward grip and helps with the recoil.

Reloading and Amunition:
The Lee reloading dies from Alexander Arms work very well and I have been very pleased with the fit and function of those dies.  Also the size of the .50 cal and the straight walls of the cases are very easy to work with and relaod.

Why not just use a 12 gauge Rifled slug?
I have been doing a lot of thinking about this because they are a little similar in ballistics.
The first thing you have to do is figure how many grains a 1 once slug is?  1 ounce = 437.56 grains.
So even the biggest 400 grain Beowulf bullet is still slightly smaller than a 1 once 12 gauge slug.
The diameter is also different with 12 gauge coming around .75 caliber significantly larger than as .50 cal diameter.
As far as price the highest performing slugs are about $5.00 each compared to the $1.25 each Beowulf Round.
Also most of the highest performing 12 gauge sabots are around ~300 grains not the top end 400 grain or even the 334 grains.  That's where the similarities (if you could call them that) end. 
The riffled free floating barrel of the Beowulf offers better accuracy. 
The Beowulf Rail system allows for better aiming devices versus that of most shotguns. 
A detachable magazine offers a higher continuous rate of fire.
So at the end of the day it will have better accuracy at longer ranges with faster follow up shots.

Beowulf
Click for larger picture (Barrel view or to quote
Jeff Quinn a "Stove Pipe")