IRON BRIGADE ARMORY DARPA XM-3 SNIPER WEAPON SYSTEM MANUAL Iron Brigade Armory under contract to the Defense Advanced Research Projects Agency (DARPA) developed and built the XM-3 to incorporate the best available technology into a sniper weapon system to address current operational concerns on size, weight, target detection, sound suppression, accuracy, range, day/night operations and the use of titanium.
XM-3 SWS IBA XM-3 Sniper Weapon System (SWS) Bolt Action .308 Win / 7.62MM CALIBER: .308 Winchester / 7.62MM Chambered for Lake City 175 Gr. BARREL: 18.5” HART 416R Stainless Steel RIFLING: 1:10 RH Twist w/ 6 Grooves MAGAZINE: Internal / Welded 5 Rd. Capacity MUZZLE VELOCITY: 2550 FPS w/ Suppressor MAXIMUM EFFECTIVE RANGE: 1000 yards LENGTH: 40.50” without suppressor 46.25” with suppressor DAY OPTIC SIGHT: 3.5-15x50 Nightforce NXS 2lbs.
Complete System List XM-3 Sniper Rifle w/ Titanium Picatinny Rail and UNS Barrel Channel Mount Nightforce NXS Mil-Spec 3.5-15x50 Day Optic Sight w/ Zero Stop Feature Nightforce .
Iron Brigade Armory, Ltd. considers all procedures included in the USMC M40A3 Technical Manual (TM05539D-10/1) to be acceptable for use on the XM-3 SWS. All M40A3 gauges used by USMC 2111/2112 armorers are acceptable for use on the XM-3 SWS. The procedures and/or specifications preferred by Iron Brigade Armory are listed below for reference purposes. Headspace: 1.630 1.636 Minimum “Go” Maximum “No Go” Bore Erosion: (Reference purposes only) “0” “4” Minimum Maximum Trigger Pull: 3.25 lbs 4.
7. Inspect bolt assembly for damage and/or excessive wear (Bolt face, bolt lugs, extractor, ejector, ejector spring, ejector cross pin, firing pin, firing pin spring). 8. Upon reassembly confirm scope ring and trigger guard bolt torque is consistent with original spec utilizing provided torque wrench. 9. Check to ensure suppressor adapter is fully intact and tight. 10. Ensure the floorplate opens properly once re-assembled. 11.
To engage the safety, place the switch in the “S” position. When engaged in the “S” position provides protection against accidental or unintentional discharge. Always engage the safety before handling, loading or unloading the rifle. WARNING: If the weapon fires unintentionally when the safety is disengaged (In “F” position) immediately clear the weapon and return to Armory for repair. Bolt Assembly The bolt assembly feeds and chambers the round. To Remove Bolt Assembly: 1. 2. 3. 4. 5.
To Install the Bolt Assembly: 1. 2. 3. 4. 5. Point the rifle in a safe direction. Put the safety in the “S” position. Align the lugs on the bolt assembly with the receiver raceway. Completely slide the bolt assembly into the receiver. Close the bolt handle. Fire Control / Trigger: 1. The trigger pull weight is set for consistency at 3.75 lb +/- .25 lb. 2. The trigger is set for combat reliability and should not be adjusted unless broken or worn.
Stock Adjustment 1. Loosen the two screws in the recoil pad using the 5/32 T-handle Allen wrench. 2. Add or remove the desired amount of spacers needed. 3. Tighten the two screws in the recoil pad using the 5/32 T-handle Allen wrench.
Day Optic Sight How To Attach Day Optic Sight: 1. Before mounting the Day Optic Sight w/ Rings, clean/lubricate the threads of each scope ring mounting bolt. 2. Ensure smooth movement of each mounting nut and mounting claw. NOTE: There are several mounting slots on the Picatinny Rail scope mount. Select the set of slots which provide the proper eye relief. Once a set of slots is chosen, the same set should always be used in order to retain zero.
How To Remove Day Optic Sight: 1. Utilizing the ½” socket and the Seekonk torque wrench loosen the front and rear mounting ring nuts but do not remove the nut from the cross bolt. 2. Rotate the day optic sight w/ rings towards the left. 3. Remove day optic sight. Loading and Unloading To Load The Rifle: 1. Point the rifle in a safe direction. 2. Lift the bolt handle and pull the bolt handle all the way back, do not remove the bolt completely. 3. Engage the safety. 4.
8. Push the magazine floorplate release. 9. The floorplate will open from the downward pressure of the loaded magazine. 10. The magazine spring and follower will drop with the floorplate allowing the loaded rounds to be released. 11. Remove the rounds. 12. Re-install the follower and spring inside the magazine box. 13. Close the floorplate ensuring the magazine floorplate release snaps out locking the floorplate. Operating Under Extreme Conditions 1. 2. 3. 4. 5. 6.
5. 6. 7. 8. 9. Remove the UNS mount by removing the (6) T-15 screws. Open the floorplate Remove front and rear T-30 trigger guard bolts. Remove trigger guard from the stock. Lift stock assembly straight up from barreled action (Only wiggle the stock to break the suction). Wiggling the stock too much may chip the edges of the bedding. 10. Assemble in reverse order using the Seekonk torque wrench on the trigger guard bolts. Storage and Transportation 1.
21. Apply grease to cam surface on bolt handle body. 22. Repeat steps 4-6 until patches come out clean, use dry patches intermittently to absorb dirty solvent. 23. Once the bore is clean and dry remove the bore guide. 24. Repeat steps 4-6, insert patch into chamber area, not the bore. 25. Rotate numerous times coating the walls of the chamber with solvent. 26. Repeat same procedure with dry patches. 27. Repeat step 4. 28.
Leveling the Reticle (Field Version) 1. Remove the Butler Creek Eye Piece Cap. 2. Reduce the power to 3.5X. 3. Loosen the scope ring cap screws evenly, just enough to allow the scope to cant left or right. 4. Holding the rifle forward, use the rear of the scope mount base as a guide. 5. Adjust the scope left or right allowing the reticle to be parallel with the flat on the scope mount base. 6. Evenly tighten the screws slowly to eliminate rotating the scope in the rings. Focusing the Eye Piece 1.
Battery Installation 1. To install the battery unscrew the battery compartment cap counter clockwise while holding the parallax adjustment to prevent it from rotating. 2. Place a new battery (CR2032 Panasonic or equivalent) positive (+) side up or facing you. 3. Replace and tighten the cap. Battery Duration: Depending on the intensity and conditions, your battery can last up to 720+ hours of continuous use.
Illumination System Operation To activate reticle illumination pull outward on the parallax turret assembly. To deactivate the reticle illumination push inward on the parallax turret assembly. Care and Cleaning (Optics) Use a lens brush to remove loose particles of dust and a high-grade glass cleaner applied on a cotton swab. Begin moving in a circular motion from center to the outer edge of the lens. Do not apply excessive pressure.
3. Back out the two set screws on the elevation turret cap, one on each side. 4. Rotate the cap clockwise, you should not feel any clicks. 5. Lift cap upward while rotating clockwise (Never rotate turret cap counter clockwise while set screws are loosened).
6. Loosen screws on clutch assembly 2 turns (DO NOT REMOVE). 7. Rotate top cap clockwise until it stops (No clicks should be felt).
8. Upon completion there should be no clutch gap. 9. Using a flat head screw driver turn brass screw clockwise (Downward) the number of clicks desired below your current zero, in this case 4 clicks for 1 MOA. 10. Tighten four screws evenly and very gently, DO NOT TORQUE.
11. Re-install the turret cap by pushing downward and rotating clockwise (Never Counter-Clockwise) until set to the number “9”, since that is 1 MOA below the “Zero”. The number of clicks adjusted down in step “9” must match the number below “0” you set the turret cap on. If you adjusted the brass screw 12 clicks (3 Minutes) set the turret cap on 7 and so on. Problem: There is not enough depression to zero the rifle, the turret will not move downward far enough.
Average Come Ups The below data was established with a 100 yard zero as the baseline. These come ups are an average, not a guarantee. Data Book reference is required for exact shot placement. High Altitude ELEVATION 8692 FEET 175 GRAIN Lake City AA11 Yards 2002503004505005506006507007508008509009501000 Mils 0.60 1.03 1.49 3.07 3.66 4.29 4.96 5.56 6.37 7.12 7.88 8.70 9.56 10.48 11.4 TEMP 32F Bore Height 2.5 inches MOA 2.0 3.5 5.1 6.8 8.7 10.6 12.6 14.8 17.0 19.4 21.9 24.5 32.9 36.0 39.
Normal Altitude ELEVATION 450 FEET 175 GRAIN Lake City AA11 Yards 2002503003504004505005506006507007508008509009501000 Mils 0.60 1.07 1.55 2.09 2.67 3.30 3.97 4.66 5.39 6.17 7.00 7.89 8.84 9.82 10.88 12.00 13.18 TEMP 70F Bore Height 2.5 inches MOA 2.1 3.7 5.3 7.2 9.2 11.4 13.6 16.0 18.5 21.2 24.1 27.1 30.4 33.8 37.4 41.3 45.
SOUND SUPPRESSOR Operation and Characteristics SPECIFICATIONS FOR FA762SS FAST-ATTACH™ LIGHT WEIGHT SOUND SUPPRESSOR FA762SS OPERATOR’S MANUAL Record Suppressor Serial Number here ___________________ 23
SPECIFICATIONS FOR FA762SS SOUND SUPPRESSOR Suppressor Material: High Temperature Alloys / Stainless Steel Weight: 19 ounces Diameter: 1½ inches Length: 9.8 inches Length in front of muzzle: 7.2 inches (Varies depending on adaptor) Length in front of Compensator: 5.
SUPPRESSOR INSTALLATION WARNING: Confirm that weapon is unloaded and on Safe (Refer to your weapon’s Operator Manual for weapon safety features and handling instructions.) With muzzle pointed in a safe direction remove the magazine, lock the bolt to the rear and inspect chamber and receiver verifying the weapon is clear. 1. OPEN Locking Ring • Hold the Suppressor body in your left hand with the front facing away. • Depress the Ratchet Stop Tab with thumb.
Note: Tightness of the Locking Ring is critical to accuracy and minimal point of impact shift. 4. Confirm Tightness! • Fully tighten the Locking Ring as tight as possible! • Never back it off to the last notch! Note: The Locking Ring notches are a failsafe to keep the Suppressor attached if something rubs against the Locking Ring. If the tooth on the Ratchet Stop does not drop into a notch when the Locking Ring is fully tightened, that is OK.
2. Open Locking-Ring Hold Suppressor body with your left hand pulling Suppressor lightly into the weapon. Grasp the Locking Ring firmly and press your knuckle against the Ratchet Stop, disengaging it. Then break the Locking Ring loose by quickly rotating it counterclockwise. Now relax your grip and continue rotating the ring until it stops. 3. Firmly pull Suppressor forward, twisting left and right, to remove it from the Compensator/Adapter.
2. Copper remover/gun cleaning solvent may be used to remove fouling from the Compensator/Adapter. NOTE: Do not allow solvent(s) to flow into the Suppressor body. COMPENSATOR / ADAPTER FA762SS Bearing Surfaces to be cleaned Intercept Notch COMPENSATOR/ADAPTER CLEANING THE SUPPRESSOR YOU ARE USING IS A PRECISION UNIT; IT FITS WITH MINIMUM CLEARANCE AT THE BEARING SURFACES. REATTACHMENT WILL BE DIFFICULT IF THESE SURFACES ARE CARBON FOULED.
OPERATOR USE NOTES 1. ZEROING: Confirm zero both with and without Suppressor attached. SureFire Suppressors have minimal impact shift but this can very from weapon to weapon. 2. As a rule all Suppressors have flash on the first round fired because of air inside the Suppressor mixing with the combustion gases. After the first round most of the flash is eliminated due to the Suppressor being filled with inert gases. 3.
It is important to adjust the wrap correctly. There is a front and back. There is an internal ridge built into the cover that prevents the wrap from sliding forward under recoil. You can feel the thickness on one end of the wrap—this is the back end. This internal ridge prevents the wrap from blowing off under the weapon’s recoil. To install the wrap, determine front from back. Grasp the wrap with hands and roll the wrap TIGHTLY around the suppressor.
Make sure the front end of the wrap is flush with the front of the suppressor—NO CLOTH SHOULD OVERHANG. This wrap process is best accomplished with the suppressor already installed. To remove the suppressor after firing, loosen the back end of the wrap.
Depress suppressor detent, loosen the nut and use the secured part of the wrap to handle the suppressor if it is still hot.
Manufacturer Contact Information Iron Brigade Armory 100 Radcliffe Circle Jacksonville, NC 28546 www.ironbrigadearmory.com info@ironbrigadearmory.com 910-455-3834 Phone 910-346-1134 Fax This manual was produced with the help and support of: Norman A. Chandler III Lt. Col. Norman A. Chandler II (USMC Retired) GySgt. Dwight Briggs (USMC 2112 RTE Retired) GySgt.
