Prime Base Security

[ArmySGT.]

Diret fires needs more teeth than 25mm and 40mm AGL.

How about?

Originally Posted by ArmySGT.

SYSTEM
Alternative Designations: BAT (Battalion Antitank), and VARIANTS
Date of Introduction: 1953
Proliferation: At least 50 countries
Description:
Crew: 4 vehicle with dismount, 2 vehicle mount, 8 dismounted infantry
Caliber (mm): 106
Weight (kg): 130, 113 without the spotting rifle
Length (m): 3.4, with a 2.85 m barrel
Width (on M79 mount) (m): .8, 1.524 with the legs spread
Height (on M79 mount) (m): 1.3

ARMAMENT
Main Armament: 106-mm Recoilless rifle.
Bore: Rifled 36 grooves, rh. The actual bore size is 105 mm; but is referred to as 106 mm to avoid confusion with the failed 105-mm M27 gun system.
Breech Type: Interrupted thread , hand-operated
Recoil System: Vented breech
Feed: Manual
Traverse (°): 360
Elevation (°) (M79 Mount): -17/+65
Rate of Fire (rd/min): 5
Emplacement/displacement time (min): INA
Fire From Inside Building: No
Complete Round Weight (kg): 13
Muzzle Velocity (m/s): 570
Spotting Rifle: .50 cal M-8C, magazine-fed. It uses a .50 cal semi-auto spotting rifle mounted along the axis of the barrel to determine proper elevation for the 106-mm rifle. The round matched to M40 round flight ballistics, and holds a 20-round magazine.

SIGHTS
Name: Bofors Modernization Package
Daysight:
Name: Simrad LP101 laser day sight (in place of the ranging gun)
Others available: Computerized LASer Sight (CLASS)
Upgraded systems may have the Simrad laser sight in lieu of the ranging (spotting) gun.
Night Sights:
Name: NVL-11 Mk IV II sight with computer LRF
Range: 990 m.
Others available: Simrad KN250 II sight, other II and thermal sights

VARIANTS
M40A1: Initial fielded version of the rifle which was commonly exported, with the M-8C spotting rifle.
M40A2: Upgrade with an M79 mount.
M40A4: The latest fielded version, with the M27 tripod.
Other countries have produced the rifle, under license, and mounted it on various chassis.
Bofors Retrofit Program: Upgrade program, with the Simrad sights and the 3A-HEAT-T round.
The weapon can be porteed, carried on a vehicle pintel mount, then transferred to a ground semi-mobile tripod mount.
M79 Mount: Tripod, ground, or vehicle
M50 Ontos: Six-barrel mount on small tracked vehicle
PAK-66: Austrian M40 on two-wheel carriage

AMMUNITION
Name: M344A1
Type: HEAT
Range (m):
Maximum Effective: 1,350
Maximum Range: 2,745
Armor Penetration (mm CE): INA
E-factor = 1255 48 * 2.5^[3.322(log(300) - 1.4049)]= 1255.079738
DPW= 2332.149201
It uses 2.79lbs or 1 Kg of Comp B.
Complete Round Weight (kg): 16.8
Muzzle Velocity (m/s): 503

Name: 3A-HEAT-T (Bofors upgrade)
Type: HEAT-Tracer
Maximum Effective Range (m): 2,000
Armor Penetration (mm CE): 700 +
E-factor = 3847 48 * 2.5^[3.322(log(700) - 1.4049)]= 3846.98682
Complete Round Weight (kg): 14.5
Muzzle Velocity (m/s): 570

Name: M346A1
Type: HEP-T (HE plastic-tracer)
Filler:7.72 lb (3.501733 KG) Comp A3
DPW= 8085.70675
Maximum Range (m): 6,870
Complete Round Weight (kg): 16.95
Muzzle Velocity (m/s): 498

Name: M581
Type: APERS-T (antipersonnel-tracer) (flechette)
Fill (.5 g ea): 10,000 flechettes
Maximum Effective Range (m): 300
Complete Round Weight (kg): 18.73
Muzzle Velocity (m/s): 438

Name: HEAP M-DN
Type: HE antipersonnel (steel pellets)
Fill: 1,000 steel pellets
Maximum Effective Range (m): 1,500
Lethal Radius: 40
Complete Round Weight (kg): 16.4
Muzzle Velocity (m/s): 560

NOTES
The producer of the LAHAT gun-launch ATGM (pg 6-58) offers to produce a version for use in the M40 launcher. The tandem ATGM is a viable threat to all modern armored vehicles. Use requires a tripod-mounted laser guidance unit, as used with MT-12 and 2A45M AT guns.
The rifle produces a massive amount of noise and smoke which reveals its location. Thus a first round hit is critical.