UK - AS90 Ukraine

Ukraine: What can UK's self-propelled AS90 howitzers offer

Exercise DYNAMIC FRONT 22

Deep Strike: The Future of British Warfighting?

US - M270 MLRS

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 Source: U.S MILITARY SUPERIOR

M270 MLRS- Multiple Launch Rocket System Weapons

The M270 Multiple Launch Rocket System (M270 MLRS) is an armored, self-propelled, multiple rocket launcher (a type of rocket artillery). Since the first M270s were delivered to the U.S. Army in 1983, the MLRS has been adopted by several NATO countries. MLRS was developed jointly by the United Kingdom, United States, West Germany, France and Italy, developed from the older General Support Rocket System (GSRS). The M270 MLRS weapons system is collectively known as the M270 MLRS Self-Propelled Loader/Launcher (SPLL).

US - Paladin M109A6 SP Howitzer

 Source: United States Defense Media

US Army M109A6 Paladin 155mm Self-propelled Howitzer

Source: M109 howitzer - Wikipedia

The M109 is an American 155 mm turreted self-propelled howitzer, first introduced in the early 1960s. It has been upgraded a number of times, most recently to the M109A7. 

The M109 has a crew of four: the section chief/commander, the driver, the gunner, and the ammunition handler/loader. The chief or gunner aims the cannon left or right (deflection) and up and down (quadrant).

With the cancellation of the U.S. Crusader and Non-Line-of-Sight Cannon, the M109A6 ("Paladin") will remain the principal self-propelled howitzer for the U.S. for the foreseeable future until the new M1299 will enter service.

Specifications
Mass	27.5 tons
Length	30 ft (9.1 m)
Width	10 ft 4 in (3.15 m)
Height	10 ft 8 in (3.25 m)
Crew	4 (Ammunition Handler/Loader, Gunner, Commander, Driver)
Shell	separate loading, bagged charge
Caliber	155 mm L/39 caliber[2]
Breech	interrupted screw
Traverse	360°
Rate of fire	Maximum: 4 rpm/3 min.[3] Sustained: 1 rpm[3]
Effective firing range	Conventional: 21 km (13 mi) RAP: 30 km (19 mi)
Main armament	M126 155 mm Howitzer
Secondary armament	.50 caliber (12.7 mm) M2 machine gun
Engine	Detroit Diesel 8V71T 450 hp (335.56 kW)
Power/weight	18.7 hp/t
Suspension	torsion-bar
Operational range	216 mi (350 km)
Maximum speed	35 mph (56 km/h)