BM stands for boyevaya mashina (Russian: боевая машина – combat vehicle), and the nickname grad means "hail". The complete system with the BM-21 launch vehicle and the M-21OF rocket is designated as the M-21 field-rocket system and is more commonly known as a Grad multiple rocket launcher system.

BM—21式火箭炮，绰号“冰雹”（Grad，早期绰号为“斯大林风琴”），于1964年以前装备苏军。 摩步师和坦克师属炮兵团均编有一个BM一21式火箭炮营。 除苏联外，阿尔及利亚、安哥拉、保加利亚、乍得、古巴、埃及、埃塞俄比亚、民主德国、匈牙利、伊朗、伊拉克、黎巴嫩、墨西哥、莫桑比克、尼加拉瓜、波兰、叙利亚、坦桑尼亚、越南、北也门、南也门、赞比亚等也都装备有这种火箭炮。 中国亦有其仿制型号。 BM-21式火箭炮采用乌拉尔-375（6X6）卡车底盘和40管火箭 …

白俄罗斯改装型-作战车辆MLRS“ Grad-1A”（贝尔格莱德）安装在MAZ-6317卡车的改装底盘上。 最高速度：85 km / h，续航距离：1200 km，BM重量：16.45吨BM计算：6人。 携带60枚导弹的备用弹药。

The field 122-millimeter divisional MLRS BM-21 Grad is designed to destroy open and sheltered manpower, unarmored vehicles and armored personnel carriers in the area where artillery and mortar...

The BM-21 Grad is a Soviet truck-mounted 122-mm multiple rocket launcher, developed in the early 1960s. The development of the 122 mm BM-21 Grad divisional-level RSZO took place in the mid-1950s under the guidance of the Splav Scientific Production Concern at Tula.

2021年6月9日 · Developed in the 1960s, the BM-21 Grad has become the most numerous and widely-deployed multiple launch rocket system (MLRS) in the world. Given the fact that a single launcher is capable of firing a full salvo of 40 122mm rockets over a wide area in under 20 seconds, the name ‘Grad’ – the Russian word for ‘hail’ – is fitting.

The BM-21 Grad is a Soviet-designed multiple rocket launcher (MRL) system that has been widely used by numerous countries around the world. The system, developed in the early 1960s, is based on a 122 mm rocket caliber and has become one of the most recognizable and widely produced artillery systems of its kind.

2017年3月29日 · 本文件分配给SKB-203为Gradot MLRS，科学研究所-6（今中央化学与力学研究所）创建战斗和运输车辆 - 开发用于固体燃料发动机充电的新型火药RSI，GSKB-47-非营利组织玄武岩的未来是在巴拉希哈科技研究所制造火箭弹头和机械保险丝的发展。

2022年6月10日 · Detailing the technical specifications, development, and operational history of the BM-21 (Grad) Multiple Launch Rocket System (MLRS) including pictures. The global defense reference actively compiled since 2003

2019年2月11日 · Based on the analysis of the Russian and foreign MRLS models in service, representatives of the Main Rocket and Artillery Directorate (GRAU) of the Ministry of Defense of the Russian Federation are considering the creation of the Grad MLRS with mechanized charging of the guide pack.