Filter
Top Products
12
UMP SUBMACHINE GUN
Buttstock
The buttstock folds to the right along the upper receiver, and with the
stock folded, the UMP is only 17.72 inches (450 mm) long. The open
frame-type design of the buttstock also enables the weapon to be fired
with the buttstock folded.
Pressing the catch releases the buttstock for folding. When folded, the
buttstock engages on the catch located on the forward part of the
ejection port. For unfolding, the buttstock is lifted off the catch.
The buttplate has a rubber pad to ensure non-slip contact with the
shoulder. This cheek piece is also rubber covered to enhance shooter
comfort during firing. In the forward part of the buttstock a hole is
provided for insertion of the locking pin during disassembly.
Fig. 7 Folding the buttstock Fig. 8 Unfolding the buttstock
Assembly Group 2 Bolt Group
The bolt group, together with the recoil spring assembly, is contained
inside the upper receiver. The reciprocal movement of the bolt group
provides for feeding and ignition of the cartridge, for extraction and
ejection of the spent case as well as for cocking of the hammer. The
right side of the bolt has a thumb recess for manual closing of the bolt
(forward assist).
The recoil spring assembly pushes the bolt forward into the firing
position The cone-shaped support for the recoil spring assembly is
housed in the backplate of the lower receiver. The longitudinally
movable guide ring supports itself within the bolt.