This is a Warhammer 40,000: Adeptus Mechanicus Tech-Priest Manipulus [59-21]

The Tech-Priest Manipulus miniature carries an Omnissian staff and has a choice of either an infantry-shredding transonic cannon or armour-busting magnarail lance as a ranged weapon. The Manipulus also features a mechadendrite harness to help him perform battlefield repairs – and to pull bits off his enemies should they stray too close!

This kit is supplied in 22 plastic components and is supplied with a Citadel 50mm Round Base.