1. 50TH ANNUAL NDIA SMALL ARMS SYMPOSIUM AND EXHIBITION
25mm Anti-Material Payload Rifle (AMPR-XM109)
50TH ANNUAL NDIA SMALL ARMS SYMPOSIUM AND EXHIBITION
This briefing details the aspects of the XM109 25MM Anti-Materiel Payload Rifle.
Neil Lee
U.S. Army ARDEC
AMSRD-AAR-AEW-S(D) Bldg 65
Picatinny, NJ
(973)
Sergio Aponte
U.S. Army ARDEC
AMSRD-ARR-AEW-M (D); Bldg 7
Picatinny, NJ
(973)
Ralph Mazeski
U.S. Army ARDEC
AMSRD-AAR-AEM-I; Bldg 65
Picatinny, NJ
(973)

2. Questions Briefing Agenda: Neil Lee: The IPT Facts & Claims
The Barrett 25mm Rifle System
Project Schedule
Sergio Aponte:
Battelle Weaponeering Study
Niceville Armor Piercing Tech Demo
Technical Challenges
Recoil Mitigation
Ralph Mazeski
25mm Ammunition & etc.
Questions
The attached agenda will be followed. I will address the weapon system and its benefits. Sergio Aponte will address the technical issues. And Ralph Mazeski will provide information on the ammunition. This will be followed by a brief period of questions and answers if time permits.

3. IPT Arrangement Sponsor The U.S. Special Operations Command Neil Lee
Sergio Aponte
Steve Small, Ph.D.
CPT Bowser
USSOCOM
Weapon Developer
Ronnie Barrett
Bob Gates
Bob Galleazzi
M107 PM
Crew Served Weapons
Cape Aero Space
Charles Poff
Recoil Mitigation
Ammunition Issues
AETC
Ralph Mazeski
Dennis Durkin
Ammunition Developers
GDOTS
Matt Solverson
Kaman Dayron
Recoil Mitigation
Gamma
Tim Lindsay

4. Facts & Claims
Facts
A known commodity: The Barrett M107 is combat proven and User respected—the XM109 possesses much of the same architecture as the M107
Ammunition Availability: The 25mm XM109 will use the self-same 25mm armor-piercing ammunition as the Objective Crew-Served Weapon (XM307)
Claims
The 25mm XM109 offers significantly greater lethality than the .50 caliber XM107 against C4I SAR targets
Near term: Penetration potential from optimizing warhead promises over 1 ½ -inches of RHA at 1200 meters and beyond
Long Term: Optimized AP ammunition offers 2 + inches of HHA
This weapon is based on the M107, and will use the XM1049 HEDP ammunition currently under development at GD-OTS. Interim ammunition provides penetration in excess of 1.5 inches of RHA at 1200 meters. While the XM1049 ammunition will provide over 2 inches of penetration of HHA at ranges up to 2000 meters. Thermobaric ammunition solutions are also being explored.

5. XM107 Baseline System Caliber .50 BMG (12.7 X 99mm) Chamber
Specifications
  Caliber
.50 BMG (12.7 X 99mm)
  Chamber
Chambered for commercial and MATCH ammunition
  Operation
Semi-Automatic - Short Recoil Cycle
  Barrel Length
29 inches (73.67 cm)
  Rifling Twist
1 turn in 15 inches (38.1 cm)
  Rifle Weight
28.5 pounds (12.9kg)
  Overall Length
57 inches ( cm)
  Disassembled Length
38 inches (96.52 cm)
The M107 has the following listed specifications and serves as a baseline for the XM109.

6. SYSTEM CHARACTERISTICS
WEAPON SYSTEM HAS RAPID CONVERSION CAPABILITY FROM M107 TO XM109
XM109 & M107 HAVE 70% COMMONALITY
MAJORITY OF REPLACEMENT PARTS ARE CURRENTLY IN SUPPLY SYSTEM
WEAPON SYSTEM IS 10 INCHES SHORTER THAN M107
CAPABLE OF DEFEATING MOST LIGHT ARMOR AND MATERIEL TARGETS OUT TO 2000 METERS
Conversion from M107 to Xm109 may be accomplished in under 2 minutes in a field environment. Logistical support is readily available currently for most of the parts.

7. XM109 Prototype Caliber 25mm Chamber
Specifications
  Caliber
25mm
  Chamber
Chambered for OCSW – XM307 ammunition
  Operation
Semi-Automatic - Short Recoil Cycle
  Barrel Length
29 inches (73.67 cm)
  Rifling Twist
TBD
  Rifle Weight
<35 pounds (15.9kg)
  Overall Length
46 inches ( cm)
  Disassembled Length
38 inches (96.52 cm)
The system is nearly one foot shorter and adds approximately six pounds in overall weight.

8. Project Schedule
Fragmentation Testing of Baseline Ammunition May ’04
Limited Safety Release scheduled for August ’04
3 weapon systems delivered to APG
1675 total rounds of AP and TP ammunition
Initial Delivery of XM1049 HEAP ammunition September ‘04
User Assessment scheduled for October ’04
10 weapon systems delivered to SOCOM
2000 total rounds AP and TP ammunition
User Assessment Report expected December ‘04

9. Battelle Weaponeering Study
Summarized Results: Probability of Target Defeat
Big Bird Radar
At 800 meters the XM109 required half as many rounds as the XM107.
BMP-3
At 800 meters the XM107 required 2 times more rounds than the XM109.
The results compiled from our Batelle weaponeering study indicate that both the Big Bird Radar and BMP-3 could be defeated with half as many rounds when compared to .50 caliber systems.

10. Range
Single Shot Test Barrel Using Mk 211 Ammunition (MoA)
Single Shot Test Barrel Using 25mm TP OCSW Ammunition
(MoA)
M107 OTF2 (SN 3629) Using Mk 211 Ammunition
XM109 Using 25mm TP OCSW Ammunition (MoA)
600 meter
.71
2.49
2.30
2.53
800 meter
1.34
2.76
2.74
3.33
The following results were obtained during range testing of the Mann barrels and rifles of M107 and XM109.

11. Tech Demo – 19 June 2003 Set-up: Location:
High Speed and normal speed video record of pre-demo and demo at both target (perpendicular) and weapon (side view) locations
6 foot x 6 foot x 1 inch thick armor target at 207m
(RHA)
All shots fired by remote operation
Location:
Niceville, Florida
Technical demonstration was conducted on 1 inch RHA at 207 meters.

12. Training-Practice and Armor-Piercing Ammunition,
and the Target Effects
19 June 2003 – Niceville, FLA.
As may be seen from the video the round fully penetrates the plate with massive terminal ballistic effects.

13. CARTRIDGE, 25 MILLIMETER: Target Practice (TP) XM1050
20,000 rounds built and fired to date
Mann barrel dispersion ~ yards
System dispersion ~ meters
Simple two piece projectile construction
Integral rotating band
Common cartridge case, primer and propellant
The XM 1050 Target practice round is ballistically equivalent to the XM1049

14. CARTRIDGE, 25 MILLIMETER: Armor Piercing, XM1049
Off the shelf nose fuze with spitback
Advanced molybdenum shaped charge liner
Over 2 inches of armor penetration (Lab)
Flight tested to 963 Meters
Dispersion ~ 0.75 mils
This hole shows the behind armor capability of the XM1049 HEDP.
Behind Armor Witness Plate
First Generation

15. CARTRIDGE, 25 MILLIMETER: Armor Piercing, XM1049
Improvements:
Remove nose fuze = greater penetration
Base fuze utilizes existing HE safe and arm
Reduced parasitic weight
Addition of self destruct feature
Provides basis for high explosive dual purpose (HEDP) airbursting capability
This sketch depictss the design characteristics of the XM1049 ammunition.
Next Generation