In God
We Trust

AR-MasterTM
Multiple Aiming Solutions for Tactical Engagement RiflesTM

Home

New Products

Stock Pivot AdapterTM

SPA1 Press Release

Mount Rail MultipliersTM

Headspace Control ShimsTM

What is 
Headspace?  How do we help?

Headspace Control ShimsTM Test

Headspace Control ShimsTM FAQs

Shooting Links

 

***This website frequently updated, use your REFRESH button for revisited pages!!

Stock Pivot AdapterTM  (patented)

Because Redundancy Saves LivesTM
Law Enforcement Needs It
3-Gun Shooters Want It



Shown here in gold the Stock Pivot Adaptor (SPA) permits a rifle's action to rotate relative to the butt-plate/stock to incorporate usage of multiple mounted sights or scopes achieving Multiple Aiming SolutionsTM.  One of MANY sighting scenarios possible using the SPA.  Traditional 3x9 rifle scope mounted atop the flat top receiver, a redundant 2x7 intermediate eye relief scope mounted to the handguard rail.  This particular scenario represents a redundant or dual-purpose long distance configuration.  

Why the Stock Pivot Adapter?
The SPA is to the rifle what the transmission is to the car.  You wouldn't drive a car with only one speed or direction, why would you LIMIT your rifle to one zero?  The SPA lets you turn your conventional rifle into a versatile multi-mission rifle.  ONLY the SPA enables you to instantly access multiple sights while On-Target On-the-Stock (OTOS).  OTOS means you're in a precision, cheek-weld shooting position fixed on the target.  Multiple sight rifles offer redundancy in cases of damage to the primary sight, multiple zero combinations, daylight/night sight combinations, and side sight acquisition to aid firing with a gas mask.  Instantly access a different sight simply by rotating the action/sight into an indexed position without ever leaving the stock or precision shooting position.  Additionally when the action is rotated 45 or 90 degrees the pistol grip and hi-capacity magazines protrude to the side and not straight down, aiding lower/narrower defensive operational positions such as beneath vehicles, match obstacles, or other horizontal working envelopes.  Terrorists and Bad guys don't wait for you to come off the gun, swap sights with the quick-change mounts or change your zero, then reacquire them in your sight picture.  BE PREPARED with multiple zeros!

Needs for the Multi-Mission Rifle
1)  SWAT, Secret Service, Special Forces types need the ability to INSTANTLY engage two completely different ballistic sighting applications.  Taking a steep down angle shot from a roof top/helicopter, or instantly engage a target on a level plane in/on the building across the street.  Range tables are good, but they invite human error and slow reaction time for split second shots.

 2)  In the public safety arena an INSTANT redundant solution is needed as a backup for cases of damage or loss of zero to the primary sight.  A follow up shot to recover from a lost zero shot can be instantaneous, OTOS.

3)  Public and National Defenders need the ability to INSTANTLY engage close range or long distance targets without making holdover/under guesses or trying to memorize range tables.  Multiple sights is the answer.

4)  Public and National Defenders need the ability to INSTANTLY engage from narrow or prone defensive positions under cover.  When the action is rotated 45 or 90 degrees the pistol grip and hi-capacity magazines protrude to the side and not straight down, aiding  lower/narrower defensive operational positions such as beneath vehicles or other horizontal working envelopes.  

5)  Many tactical operations are performed in twilight hours. Public and National Defenders need the ability to INSTANTLY select engagement with night vision/thermal or daylight optics depending on changing light conditions. SPA lets you choose the right sight, RIGHT NOW, OTOS!

6)  Sight acquisition while using a gas mask.  Only the SPA lets you orient the sights to the side while keeping the butt-stock in the vertical position.  This helps the shooter maintain a conventional shoulder pocket hold of the stock.  Regardless if you use the model MCU 2AP, the M17, or any other mask, every agency using gas masks should be training with and using the SPA to improve the precision of their gas mask shooting operations.  Let's face it, life defending shots should not have to be made awkwardly holding the rifle and butt-stock catawampus across your shoulder/arm.  You are training for, or engaging in critical contingencies, USE THE EQUIPMENT SUITED FOR THE JOB!

Standard Configurable Positions of the SPA1
The SPA1 may be installed to one of three available configurations.   While the butt-stock is in the upright (vertical) position the receiver and pistol grip may be rotated from the standard position to either:
Counter Clockwise 45 and 90 degrees (right hand configuration),
or Counter Clockwise 45 and Clockwise 45 (neutral configuration),
or Clockwise 45 and 90 degrees (left hand configuration).

Multiple Mounting Scenarios, Not Limited to:
Redundant Sites (narrow working envelope or backup for broken primary sight)
Long Distance - Short Range Scope/Sight combinations (scope - red dot)
Iron Sight - Optical Sight combinations
Spotting/Ranging - Precision Engagement Scope combinations 
Night Vision/Thermal - Daylight Sight combinations

Specifications:
Application: Currently available for the AR-15 A2 butt-stock (model SPA1). AR-15 A1 butt- stock (model SPA1-A1), Shorty, or ACE stock are special order items please contact for details.  Derivatives for other rifles/models are in progress, your input is valued!  Model SPA2 for the M4/CAR-15 collapsible stock will be available soon, email or call to be placed on a list to be contacted when this item is available. 
Color: Black
Weight: approximately 6 oz (SPA only)
Stock Screw: Not drilled for drainage (drainage drilled screws are available at an additional cost)
Stock added length: approximately 1.15"
Total rotation: 90 degrees (indexes at 45 degree intervals)
Contents: visual of SPA1 contents click here
Introductory Price (subject to change): $140 (call for availability & current pricing)

Options:
SPA1 Tactical Sling Swivel Stud (below left): Introductory Price (subject to change) $12 (call for availability & current pricing)

SPA1 Stock Locking Pin (above right): Introductory Price (subject to change) $15 (call for availability & current pricing)

Download Full Length MPG video clip (12.3 Mb)

Download Short MPG video clip (2.8 Mb) 

Don't compromise safety by using inadequate weaponry.  After using the SPA on one rifle YOU WILL SEE that you need an SPA for each rifle!

Help!  My BOMB sniffing Police dog ate my installation instructions and configuration data!

Help!  The Chief ignored the warning tag and twisted the SPA before it was installed and dislodged the spring and detent ball!

Secret Service, SWAT, FBI, BATF, US Customs, Border Patrol, US Marshals, Special Forces, Texas Rangers, Police Agencies, Sheriff Departments, Drug Enforcement Agency (DEA), Department of Energy (DOE), Department of Defense (DOD), Navy SEALS, Force Recon, Army Rangers, DELTA Force

Eclipse Engineering & Design
P.O. Box 12525
Everett, WA 98206
Phone 425-338-9895

               
  send us e-mail               HOME