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New 50 Caliber
Single shot receiver with 5 shot magazine
Effective range 3,000 yards
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 20 mm and 14,5 mm Sniper Rifles also available
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    The WindRunner was tested September 97 and evaluated by the FBI, SWAT, Marine Snipers and an elite team. 

    The following results were recorded at this shoot: 

    Accuracy              :   ½ MOA achieved at 1 004 yards – We  
                                   guarantee 1 MOA @ 1 000 yards 
    Scope used           :   Leupold MK 4 M1 – 16 x power                               
                                   W/Mil-Dot  Reticle                    
    Ammo used          :   Mance Bore Ridder Bullet with 765gr with 253gr of     
                                   N-29 ( Match Grade ammo) 
    Velocity                :   2878 Feet per second 
    Steel Barrel  28”    :   1-15 Twist, 8 Lands and 8 Grooves  60 – 40 Ratio    
                                   Carbon Graphite barrel also available 
    Magazine              :   Five shots 
    Weight                  :   29 lbs fully equiped with bipod and scope 
     
     

 
 
 " Whilst Invisible, I See and Destroy " 
  
 
WORLD'S FIRST .50 Cal - Removable Barrel 

PRESS RELEASE                         NEW MODEL .5O Cal Rifle 
23rd November 1997                                Compact - Tactical & Take Down Barrel 
 
First Defense International introduces a World First brand new model .50 Cal. Rifle, single 
shot and with a 5 shot magazine, removeable barrel, tactical adjustable sliding stock. The WINDRUNNER, is the finest and first .50 cal Breakdown - Tactical Sniper rifle in the World 
today manufactured in the USA. No other fifty caliber rifle on the market today can compete 
with these results and performances. ( 1/2 MOA at  1004 yards recorded) Tested at the 
Aberdeen Proving Grounds, Scout Sniper Instruction School, SWAT and the FBI with new 
applied technology designed by EDM Arms. 

The new WINDRUNNER receiver incorporates changes that improve Precision Accuracy at extreme long distances using close tolerances of Electrical Discharge Machining and precision 
CNC milling normally associated with space age technology.  The receiver is the only one piece 
in the world today with supporting I beams giving added strength and easy maintenance. The WINDRUNNER is constructed of 4140 chromoly steel, heat treated to 42 rockwell hardness 
before any machining after which the steel is wirecut.  This method eliminates warpage and movement in parts and an exceptional smooth finish as though treated with a Teflon coat. 

Supporting the entire length of the receiver on the bottom is a 1" thick " I " beam x 1.625 " wide increasing the strength of the receiver by 60% and a tapered scope base cut into the top of the receiver which is not removable in order to prevent any vibration.  A guiding rail and guiding 
finger have been built into the receiver, bolt to ensure a firm smooth operating bolt from front to rear. 

The firing pin system incorporates a set firing pin at a depth of sixty thousands (.060) preventing 
pins from backing out, with a claw extractor system working from the top side of the bolt having 
twice the surface area for extraction that side extractors have. The ejection port is increased in 
size to accommodate the longer length bore rider bullets used in competitions. 

The bolt handle on the receiver fits over the backside of the bolt onto orientation slots and then threaded into place as one piece, preventing the bolt from breaking loose when tapped open.For added safety gas vent holes are faced rearwards through the face and side of the bolt including 
the body of the receiver to vent gas as far away from the shooters face as possible. 

The WINDRUNNER ‘s  accuracy is further improved by threads that hold the barrel centerline 
to the bore, allowing for the barrel to be changed in a very short time because it is threaded 
through the recoil lug into the receiver and then tightened by a retaining sleeve threaded over the 
top of the barrel in place, as well as set the head space. 

Compact for transportation in the field, vehicles, paratroopers and discreet in specially designed waterproof/floating O 'Ring sealed carry cases approximately 30"  x 15 "  

  •  Removable Barrel - Like the 9mm Uzi 
  •  Remington triggers set at 2 - 5lbs
  •  Carbon One Graphite Barrels available.
  •  All  5 shot Windrunner’s are less than 1" minute of  angle at 1000 
  •  yards. 
  •  Effective range  3,000 yards.
  •  The 5 shot model is as accurate as the single shot.
  •  Steel barrel, with magazine, bipod and scope under 30lbs.
  •  Tactical adjustable sliding stock
  •  Tactical Scopes
  •  14,5 mm - 15 mm and 20 mm Sniper models also
  
SNIPER TACTICAL SCOPES 
SN-3 Special Weapons and Tactics *OMNI-Mission Telescopic Sight
 
The most versatile Mid-Perimeter Police tool and Omni-Utiliscent sighting tool ever made! 
Options to: 1. Pass Military Drop Test. 2. Submarine and air drop contingencies. 

The SWAT-OMTS unit offers a choice of over200 reticle choices, (ptnt pending) lit reticle, Tremendous light gathering (objectives of 44,58, and80mm),strongest housing made,best 
parallax adjustment made and more law enforcement and military /target options than any 
scope made. Can be made to your individual, department, or agencies’ needs/specifications--a tremendous advantage to SWAT personnel. one can see the advantage over normal scopes at a price that even small departments cannot afford to be without. 

· WARRANTY: Limited Lifetime-80 years, No Charge, No Hassle Service Policy 

Posa-Slide & lock(AR-10 and SR-25 specialty mount) 
 
MAGNIFICATION: 
1.4-6.2x MkI, 1.8-10x MkII, 2.6-12.2x MkIII, 3.2-16x, 3.8-22X MkIV 
OBJECTIVE APERTURE: 44mm, 58mm, 80mm 
MAIN TUBE: 
DIAMETER: 35mm, 30mm,, 40mm, 
MATERIAL: 6061-T6, 7075-T6, Steel, Titanium, Composite 
FINISH: 
TYPE: Hard Anodized 
COLOR: Black, OD Green, Gray, Silver 
SURFACE: Matte/Non-Reflective,Brushed or Polished 
TURRET TYPE Double 
LENSES: 
MATERIAL: Glass/High Density Recompressed 
QUALITY: Grade A, Fine Anneal 
COATING: FSSBBC, Multi/All Surfaces 
CENTRATION: 20 millionths 
SCRATCH AND DIG: 10/5 
NUMBER OF LENSES: 10+
LIGHT TRANSFERENCE: 99.4% per lens 
OCULAR LENS DIAMETER: 35mm 
RETICLE:Standard:Any popular style 
Optional:Over 200 styles 
FIELD OF VIEW 2x@100yds=58ft.masked10.2x@100yds=12.6ft.masked 
EYE RELIEF: 3.3in@2.8x, 3.0in@11.2x 
EXIT PUPIL SIZE: 10mm@3.8x, 2.3@11.2x 
FOCUS SYSTEM: Diopters -3to+3Adjustment 
ENVIRONMENTAL: 
HUMIDITY: Waterproof to 30ft. 
TEMPERATURE: -20 to 140°F 
PARALLAX SETTING: 100m fixed, others on demand 
KNOBS: US#1 Standard 
MAX MOA ADJUSTMENT: Up to 300 MOA 
MOA PER CLICK: 1/4 MOA standard 
DIMENSIONS: 
WEIGHT: 21oz.(Mk III) 
LENGTH: 13.8in. (MkIII)

SN-2 Ranging Variable
 
All the features of the SN-1 plus a unique 5 to 1 zoom ratio. Bullet trajectory in the reticle, the elevation knob or an optional unique auto trajectory compensation from 100-500yards automatically. 1/4-1/20moa external adjustment knobs for ranges beyond 500 yards. Ranging 
reticle with 8 different ranging stadia, as well as alternate X & Y scale for non-standard size 
target ranging. The SN-3 Mark IV below is the same product & design, without the 500yd. 
Auto Ranging feature. SIGHT THE WORLD’S FINEST VARIABLE POWER LONG 
RANGE LENSMATIC TELESCOPE. 
MAGNIFICATION:3.2-17X, 3.8x-22x, 6x-30x Variable Power 
OBJECTIVE APERTURE:58mm, 72mm, 88mm 
MAIN TUBE: 
DIAMETER: 30mm, 35mm, 40mm, 50mm 
MATERIAL: 6061-T6, 7075-T6, Steel, Composite, Titanium 
FINISH: 
TYPE: Hard Anodized 
COLOR: Black, OD Green, Gray, Silver 
SURFACE: Matte/Non-Reflective 
LENSES: 
MATERIAL: Glass/ High Density, Recompressed 
QUALITY: Grade A, Fine Anneal 
COATING: Multi/All Surfaces FSSBBC 
CENTRATION: 20 Millionths 
SCRATCH AND DIG: 10/5 
NUMBER OF LENSES: 10+ 
LIGHT TRANSFERENCE: 99.4% per lens 
OCULAR LENS DIAMETER: 35mm
FIELD OF VIEW: 3.8x@100yds=26ft., 22x@100yds=6ft. 
EYE RELIEF: 3.3in@3.8xm,3.0in@20x 
EXIT PUPIL SIZE: 15mm@3.8x,3mm@22x 
FOCUS SYSTEM: Objective parallax and Diopters adjustment 
PARALLAX SETTING: 100m on fixed objective systems, other on demand 
POI VARIATION: Less than 1/4 MOA in 
rear focal plane with Pro-Cam system 
ENVIRONMENTAL: 
HUMIDITY: Waterproof to 30ft. 
TEMPERATURE: -20 to +160°F 
TURRET TYPE: Double 
KNOBS: US#1 Standard 
MAX MOA ADJUSTMENT: Up to 300MOA 
MOA PER CLICK: 1/4 minute standard, 
others on demand 
DIMENSIONS: 
WEIGHT: 27oz. 
LENGTH: 16in.
SN-4 Rapid Response Optics
 
Ultra wide field of view and a Circle Dot® reticle. 1/2 M.O.A. clicks put you on target fast at 
close ranges. Widest field of view ever made. Brightness, long forgiving eye relief, and lit reticle options provide excellent low light capability. A fine 3 minute dot at high power provides 
accuracy for extended ranges. An excellent FBI concept tool. The Circle Dot reticle functions 
as a ranging device, the ultimate 1st perimeter shooting trial. The fastest, most rugged, accurate 
and versatile military and police lensmatic scope ever devised! 

Used by U.S. Navy seals and other U.S. forces 

WARRANTY: Limited Lifetime-80 years, No Charge, No Hassle Service 

Posa-Slide & Lock® mount and Screw-Lock Rings® are available for any height configuration 
and any diameter application. *First riflescope ever given the U.S. Army’s target competition designation. *(U.S. Army Reserve and National Guard) 
 
MAGNIFICATION: 1.4-6.2x 1x-4x variable and 1X,2X,3X Fixed 
OBJECTIVE APERTURE: 22mm 
MAIN TUBE: 
DIAMETER: 30mm, 35mm (MKII,III,IV) 
MATERIAL: 6061-T6, 7075-T6, Steel, Composite, Titanium 
FINISH: 
TYPE: Hard Anodized 
COLOR: Black, OD Green, Gray, Silver 
SURFACE: Matte/Non Reflective 
LENSES: 
MATERIAL: Glass/High Density, Recompressed 
QUALITY: Grade A, Fine Anneal 
COATING: Multi/All surfaces FSSBBC 
CENTRATION: 20 millionths 
SCRATCH AND DIG: 10/5 
NUMBER OF LENSES: 13+ Elements 
LIGHT TRANSFERENCE: 99.4% per lens 
OCULAR LENS DIAMETER: 35mm 
RETICLE: Recoil proof, etched and chromed on optical glass Front focal plane (Rear on demand)Circle-dot &200 others
FIELD OF VIEW: 1x @100yds=116ft., 4x@100yds=31.2ft, 3X=41ft. 
EYE RELIEF: 4.3in.@x, 3.3in@4x 
EXIT PUPIL SIZE: 20mm@1x, 9.5mm@3x  
FOCUS SYSTEM: -3.5 to +3 Diopters 
ENVIRONMENTAL: 
HUMIDITY: Waterproof to 30 feet 
TEMPERATURE: -20° to 140°F 
PARALLAX SETTING: 100m Fixed,others on demand 
POI SHFT W/PWR CHNGE:0MOI 
TURRET TYPE: Double and single 
KNOBS: #4 Standard 
MAX MOA ADJ. 140 MOA 
MOA PER CLICK: .675 MOA Standard 
DIMENSIONS: 
WEIGHT: 13.75oz. 
LENGTH: 9.5in
 
SN-1/TAR Long Range Precision Counter Sniper Optical System 
 
This is the flagship of the sniper/countersniper lensmatic optical sighting systems. This design 
effort defined our reticle - ranging format. It is a straightforward optical design formula with the appropriate options to address military applications; highest grade optics, fully supported lenses, optical glass reticles (no wires to shake loose), fixed power, minimum moving parts and 
assemblies, massive construction and the largest optical formula ever put to a shoulder fired weapon. 
MAGNIFICATION 9.6x, 17x, 22.4x, 26x, 31x, 37x, 48X 
OBJECTIVE APERTURE:(44mm), 58mm, 80mm, 100mm 
MAIN TUBE: 
DIAMETER:30mm, 35mm, 40mm, 50mm 
MATERIAL:6061-T6, 7075-T6, Steel, Titanium, Composite 
FINISH: 
TYPE: Hard Anodized 
COLOR: Black, OD Green, Gray, Silver 
SURFACE: Matte/Non Reflective 
TURRET:DOUBLE, OVERSIZE 
LENSES: 
MATERIAL: Glass/High Density, Recompressed 
QUALITY: Grade A, Fine Anneal 
COATINGS: Multi/All Surfaces FSSBBC 
CENTRATION: 20 millionths 
SCRATCH AND DIG: 10/5 
NUMBER OF LENSES: 10+ 
LIGHT TRANSFERENCE: Average of 99.4% per lens
RETICLE:FRONTOR REAR FOCAL PLANE OVER 200 PATTERNS AVAILABLE 
OCULAR LENS DIAMETER: 35mm 
FIELD OF VIEW: 16.2x@100yds=9.2ft. 
EYE RELIEF: 3.3in.@16.2x 
EXIT PUPIL SIZE: 0.15in@16.2x 
FOCUS SYSTEM: Objective Parallax and 
Diopters Adjustment 
ENVIRONMENT: 
HUMIDITY: Waterproof to 30ft. 
TEMPERATURE: -20 to 140°F 
PARALLAX SETTING:Variable 100m W/Fixed objective systems; others on demand 
KNOBS: US#1, #2, or #8 
MAX MOA ADJ.: Up to 300 MOA 
MOA PER CLICK: 1/4 MOA Std., others on demand 
DIMENSIONS: 
WEIGHT: 26oz. 
LENGTH: 16in.

 SN-9 Ultra Power
 
Huge fixed lenses (no erector tube); external W&E adjustments (improved Unertl style); choice 
of 58mm, 88mm or 100mm objective diameters; world’s most accurate W&E adjustment 
system; shockproof mounting, most rugged housing made; American made lenses and housings, tubes and knobs, reticles and mounts. Available in high resolution and ultra high resolution fixed 
or variable powers. All standard features available. 
 

BASIC MODELS: 
Fixed Power Mod I - 15x 
Fixed Power Mod II - 24x 
Fixed Power Mod III - 36x 
Var Power Mod IV - 3.2 - 17x 
Var Power Mod V - 4 - 20x 
Var Power Mod VI - 5.6 - 30x 

 

SN-6 Tactical Versatility

All of the features of the SN-3.plus extremely accurate because of its fixed power. Exceptional brightness and ruggedized features. In its basic form, it is a 100-1400 yard tackdriver. Add the capability for a lit reticle, and you have low light capability. A competent marksman can extend considerably beyond 1400 yards, (140 MOA).Can provide 200 MOA on special orders. 
MAGNIFICATION: 8x, 10x, 17X, 22X 
OBJECTIVE APERTURE: 44mm, 58mm, 80mm(OPTIONAL) 
MAIN TUBE: One Pc. Const. 
TUBE DIAMETER: 30mm, 35mm 
MATERIAL: 6061-T6, 7075-T6, Steel, Titanium, Carbon GraphiteComposite 
FINISH 
TYPE: Hard Anodized 
COLOR: Black, OD Green, Gray, Silver 
SURFACE: Matte/Non-Reflective 
LENSES: 
MATERIAL:Glass/High Density, Recompressed 
QUALITY: Grade A, Fine Anneal 
COATING: FSSBBC Multi/all surfaces 
CENTRATION: 20 Millionths 
SCRATCH AND DIG: 10/5or better 
NUMBER OF LENSES: 13 elements 
LIGHT TRANSFERENCE: 99.4% per lens(multi-band input) 
OCULAR LENS DIAMETER: 30mm
FOCUS SYSTEM: Objective Parallax and Diopters adjustment 
FIELD OF VIEW: 10X100yds=12ft(mskd),14ft(unmskd) 17x=7.5ft (masked),8.5ft(unmskd) 
EYE RELIEF: 3.8in.@10x 
EXIT PUPIL SIZE:4.4mm,5.8mm and8mm @10x 
PARALLAX SETTING: 100 yds to 2000 yds(INFINITY) 
ENVIRONMENTAL: 
HUMIDITY: Waterproof to 30ft. 
TEMPERATURE: -20 to 160°F 
TURRET TYPE: Double 
KNOBS: US#1 Standard 
MAX MOA ADJ.: up to 220MOA 
MOA PER CLICK: 1/4 MOA 
DIMENSIONS: 
WEIGHT: 14.6oz.(6x) 
LENGTH: 12.2in.(6x)

Picture Coming soon more specifications & Details - Call for info 
 
  For International Distributors and Dealer inquiries contact 
info@firstdefense.com 

 Tel : (714) 366-6444 
 Fax: (714) 366-8444 

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