Complete Raptor stainless steel receiver with 20 moa pinned,
stainless rail base and heat treated recoil lug.
Raptor receiver on top, Remington M700 LA on bottom. 
Not the added length ahead of the front receiver screw. 
This view also shows the much longer ejection port window
possible with the Raptor receiver designed for the very long
detachable magazine box system.
Looking onto the face of the Raptor.  You can see the
receiver thread quality, flat nosed bolt head design with recessed bolt face, small diameter firing pin diameter,
plunger ejector and extreme duty pinned extractor.

Raptor bolt on top compared to Remington M700.  Note the
massive size of the bolt body compared to the Rem. 700 as
well as the dramatically stouter one piece bolt handle which
is slightly longer then the factory one but much better design
for positive grip.  You also get a good look at the deep,
aggressively fluted bolt body.
Raptor bolt head on top shows the extremely large bolt lugs
as compared to the Rem 700.  The flat nose bolt design is
also clearly seen.
Raptor receiver tang on top compared to Remington 700 on
bottom.  The thickness of the Raptor tang offer extreme
strength and rigid in the stock to receiver interface of the
bedding system.
The 20 moa stainless steel rail base is shown with its 6,
8-40 mounting screws and the three heat treated steel
pins can be seen installed in the top of the Raptor
receiver.  In combination, the mounting screws and pins
make sure that nothing moves in the optical system no
matter the recoil level or weight of the optics used.  
The length of the rail base also gives much more
flexibility for rail mounted accessaries and using a four
ring mounting system.
Raptor receiver designation engraving on left side of right
hand receiver.
Raptor Receivers:  What makes then different and the best receiver made in their class.
    The Allen Precision Raptor receiver project started in 2007 and was three years in the making.  The idea was to design a receiver specifically for the purpose of being the platform for a precision big game hunting rifle.  At that time, there were many VERY good receivers on the market such as those from BAT, Nesika Bay, Stiller, Surgeon and many others.
    APS had built dozens of precision rifles with all of these receivers and they easily met the 1/2 moa accuracy potential required before shipping.  Still, there were things that could be improved on.  
    The Raptor development took three years to complete and the finalized Raptor receiver took features from the BAT and Nesika Bay receivers and combines them into one design.  Then several unique features were also engineered into the Raptor making it a truely unique and stand alone receiver.  So what makes it different, what makes it better?

What the Raptor offers over other receivers

    At first glance the Raptor has a very striking, aggressive appearance with its heavy tactical style bolt handle to the very aggressive spiral bolt fluting to the long ejection port and full length rail base.  However, what makes the Raptor special is much more then appearance. Lets look at whats inside.  The first requirement of the Raptor receiver was that it still  had to be compatible with common aftermarket components.  As such, the footprint of the Raptor receiver is basically the same as the Remington M700 Long Action with a few exceptions. This allows all the fine aftermarket stocks inletted for the Remington M700 to be used with the Raptor with only minor inletting modifications.  The Raptor also used the fine Remington trigger system and bottom metal options.
    Other then a few external dimensions and using some common aftermarket parts, that is where the similarities between the Raptor and the Remington M700 and custom clones end.
    The Raptor is designed specifically to be used with the largest modern, high performance magnums we have today including the 338 Lapua, 338-378 Weatherby and all the wildcats based on these cases as well as the Rigby and the very large A-Square chamberings such as the 338 Excalibur.
    It is also just as comfortable with standard belted magnums and the great Remington Ultra Magnum chamberings.  It can just as easily be chambered for the 270 Winchester or 30-06 Springfield but the Raptor is dramatically over built for such application.  Here is what you get.
Raptors Feature List:
-1.350" receiver diameter
-9.500" receiver length
-Receiver weight: Standard 2 lb 9 oz, Hunter model: 2 lbs 5 oz
-1.100"x16 tpi receiver thread
-1.125" receiver thread length
-0.750" receiver bolt body diameter
-5.250" bolt travel
-Solid one piece bolt design
-Heavy duty tactical bolt handle
-Aggressive spiral bolt fluting
-Flat nose bolt head design with recessed bolt face
-Extreme Duty pinned in M-16 style extractor
-Heavy Duty plunger ejector
-Extreme Heavy duty bolt lugs
-Small diameter firing pin (limits primer cratering with high pressure loads)
-Extra power 28 lb striker spring for quickest lock time possible
-Heavy rear receiver tang
-External top bolt stop lever
-Dramatically strengthened lower bolt lug support
-Shallower feed ramp angle to smooth feeding
-6.750" stainless steel, 20 moa scope rail base
-6, 8-40 tail base mounting screws
-Rail base triple pinned to receiver body to prevent any slippage
-Uses Remington M700 pinned in trigger

Raptor Receiver Options:
-Right or left hand receivers
-Single shot or repeater
-Magazine well available for: Rem 700 LA internal box, Wyatts extended 3.820" internal mag box, HS Precision DM and Seekins 3.990" DM system
-Standard or Hunter(larger) ejection port
-Bolt face diameters: 0.470", 0.535" and 0.590"

Real World Raptor Advantages:

Precision and Strength
    The primary goal of the Raptor design is shear strength.  That said, for a precision long range big game rifle, no amount of strength is worth much if the receiver is not precisely machined true and square.   Raptor receivers are guaranteed to have all critical surfaces machined true and they must have no more then 0.0002" variation across the bolt face when measured from receiver face to bolt face at 3, 6, 9 and 12 o'clock locations around the bolt face.  Receiver threads are perfectly true to the axis of the receiver bore, bolt lug support surfaces and receiver face are perfectly perpendicular to axis of bore .
    When building a rifle chambered in the magnum class rounds with large diameter case heads, squareness and concentricity are EXTREMELY critical.  You can get by with small imperfections when using small diameter case headed rounds, you can not cut corners with the large magnums and expect to get precision results down range.  Perfection is the goal with the Raptor receiver.

Raptor receiver length
        The Raptor was designed to be extra long for three main reasons.  One being the longer receiver length results in a more stable bedding surface between stock and receiver.  Second, this design allows for a longer, much stronger bolt head to be used in the Raptor receiver which offer dramatically stronger support to large diameter, high pressure modern magnum chamberings.  Third, the longer receiver offers a much longer receiver thread length.  This increases the barrel thread length which offers much more support to long, heavy barrels used for long range big game rifles compared to conventional length receiver threads for the Remington M700 and its custom made clones.  The Raptor is simply a much more stable and rigid platform because of its increased receiver length.

Raptor receiver thread diameter
    The Raptor receiver thread is 1.100" in diameter which is significantly larger then the Remington M700 and its custom clones.  The larger thread diameter results in a stronger threaded barrel shank which means the barreled receiver system will be influences less by the effects of todays modern extreme performance magnums so commonly used for long range big game hunting.

Raptor Bolt
    The Raptors bolt is the heart of its strength.  Its large 0.750" diameter offers plenty of support for large diameter magnum loaded to todays top chamber pressures which can run into the 68,000 psi range.  The Raptor also offers a very long bolt travel of 5 1/4" to easily clear even the longest magnum rounds yet feeds extremely smooth because of its precision internal machining.
    The bolt head was designed with extreme strength in mind.  The bolt lugs are nearly twice as long as the Remington 700 bolt lugs and in fact, they are as long if not longer then most receivers designed for the huge 408 Chey Tac cartridge.   Far over engineered for anything that can be chambered in the Raptor based rifle.  Simply put, this is the strongest receiver in this class BY FAR.
    The receiver bolt head is designed with a flat face.  The bolt lugs extend to the end of the bolt head which allows increased bolt lug strength.  It also simplifies barrel machining and fitting.
    The Raptor bolt head also houses an extreme duty pinned in M-16 style extractor.  This means that there is no way for the extractor to be blown out of the receiver in the rare event of a pierced primer of case head failure like the Sako type extractors sometimes can be.  While these are extremely rare, its just an added safety factor built into the Raptor receiver.
    The Raptor bolt is a one piece design, no brazing, no welding, solid steel that will not break under any extreme use.  The handle is very large and study but not overly obtrusive like some of the tactical bolt handles can be.  All the handle you need to clear even the largest magnum cases.
    The firing pin in the Raptor receiver was also designed for the specific purpose of high pressure loadings.  The small, 0.062" diameter firing pin prevents primer cratering with high pressure loadings, a common problem with many factory and custom receivers.
    The striker spring is an extra strength 28 lb striker spring that offers the quickest lock time possible.
    The aggressive spiral bolt fluting is very dramatic in appearance but it also serves an important functional role as well.  The deep, sharp, helical flutes on the bolt body act as wipers to clear dust and debris from the inside of the bolt way in a self cleaning manner.  This helps to maintain the bolt to receiver fit of the Raptor receiver.

Raptor receiver tang
    The Raptor rear tang is extremely large and robust.   Since this is one of only two critical support clamping areas of a receivers bedding system, it was designed as strong as possible with as much steel in the tang as possible.  This means no receiver flexing no matter the length or weight of the barrel.

Raptor receiver body strength
    Weak point in any repeating two lug bolt action receiver is the bolt lug support on the bottom of the receiver.  This is the thin section of steel between the front of the magazine box window and the bolt lug support surface.  This area also contains the feed ramp which futher weakens the bottom bolt lug support. It does not matter how strong the bolt head of a receiver is if the receiver itself can not support the bolt under extreme chamber pressure.
    To solve this weak point, this section of steel in the Raptor is dramatically lengthened adding nearly three times as much steel to support the bottom bolt lug.  Because of this, the feed ramp angle must be machined at a shallower angle so the rounds feeding from the magazine box will enter the mouth of the chamber properly.  This reduced feed ramp angle produces smoother feeding with the large diameter, sharp shouldered magnum chamberings used so often today.

Raptor rail base
    The Raptor rail base is a solid stainless steel, full length rail base with 20 moa cant which is ideal for precision long range big game rifles.  The length of the Raptors rail base allows much more flexibility for rail mounted accessaries or four scope ring set ups to support heavy, long range scopes on high recoil energy rifles.    Todays modern highly effective muzzle brakes which produce extreme negative G forces on the optics and mounting systems often making it hard to keep optics staying put.
    The Raptor rail is mounted to the receiver using six, 8-40 tpi mounting screws and also supported by three 1/8" heat treated pins.  This prevents any chance of the rail base slipping no matter the situation.  Like the rest of the Raptor, its optical mounting system is over engineered for extreme strength.  The only option that would be stronger would be an integral rail base machined right into the receiver such as the Surgeon and some BAT receivers but production cost would have increased dramatically.  This rail system is much stronger then is really needed and it keeps production costs down, win-win.

The Raptor receiver offers the top of the line in precision and strength and for those that want an extreme duty receiver, it really is the very best option on the market.

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