UMP / USC Series
Choose from an expansive selection of HK UMP and USC parts, such as HK UMP Barrels and HK USC Stocks, crafted for those who value reliability and performance. Upgrade with HK USC Handguards and HK UMP Triggers, and experience the difference in quality and craftsmanship.
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HK USC to UMP Stock Block B with Thumb Screw
Michaels Machines
$249.95Michaels Machines USC to UMP Stock Block B w/Thumbscrew For use with all HK UMP factory or US made folding stocks. Each unit comes with a thumbscrew on one end and a slotted section on the other end...HKP-20722$249.95 -
Holosun 510 Series Open Reflex Sight - Picatinny Mount
Holosun
$354.95Holosun 510 Series Open Reflex Sight - Universal Picatinny Mount The HS510C is a versatile open reflex optic designed for long gun applications. HS510C is at home on carbines, PCCs, and shotguns due...HKP-21656-M$354.95 -
Out Of Stock
Picatinny Rail Cover - 45mm
H&K Heckler & Koch
$14.95H&K 45mm Picatinny Rail Cover - Universal New factory HK rubberized picatinny rail cover. Specifications: Rail cover dimensions: 45x26x7 mmHKP-18857$14.95 -
HK UMP Cocking Handle - Assembly
OMEGA
$34.95Omega USC/UMP Cocking Handle Assembly Omega UMP cocking handle assembly is a great complete replacement for broken or worn out cocking handle assemblies. Everything you need for a complete...HKP-21271$34.95 -
B&T Unigrip QD with Bipod - Aluminum
B&T Brugger & Thomet
$224.99B&T Unigrip QD with Bipod - Aluminum This B&T foregrip features a retractable bipod for superior weapon stabilityHKP-21596-M$224.99 -
HK UMP Firing Pin Retainer Pin
H&K Heckler & Koch
$7.95HK UMP Firing Pin - Retainter Pin This is the pin that trips the trip lever on the UMP lower.HKP-01894$7.95 -
HK416, MR556 Optic Mount - Protac 2.0 - Picatinny, MLOK
Streamlight
$169.99Streamlight Protac 2.0 Rail Mount for HK MR556 and HK416 The Streamlight ProTac 2.0 Rail Mount HP is a high-performance rail-mounted tactical light designed for long-gun applications. Producing...HKP-21939$169.99 -
Omega K Mach 3-Lug Mount - .45 ACP
Kaw Valley Precision
$89.99Kaw Valley Precision .45 Mach 3-Lug Mount Fully captured, enclosed system designed for use with the KVP MACH Linear Comp system. By utilizing 1-1/8"x28 TPHKP-19994$89.99 -
HK45 Thread Protector - .578x28 RH - Knurled
HKP HK Parts
$14.95HKP HK Parts HK45 Thread Protector - Threaded .578x28 RH - .45 ACP The new US-made .45 ACP tactical thread protector, the cap fits all HK45 full size & compact barrels threaded .578x28 RH thread. A...HKP-17623$14.95 -
HK UMP Release Lever Spring
H&K Heckler & Koch
$9.95HK UMP Release Lever Spring For All UMP LowersHKP-01891$9.95 -
On Sale
HK USC Conversion to ACR Stock Upgrade - FDE
KDG Kinetic Development Group
Now: $293.22Was: $459.95HK USC-UMP ACR Stock Adapter & ACR Stock Combo - Brown A new product that allows you to add the widely popular Remington ACR folding, adjustable stock to your USC-UMP conversion. Each unit comes...HKP-19845Now: $293.22Was: $459.95 -
HK UMP 2 Position Complete Lower
H&K Heckler & Koch
$579.95New HK German 2 Position Lower Complete New German Heckler & Koch UMP Lower. 2 position settings (S,F). Each lower comes complete with all the factory internals. This item is ideal for the USC to UMP...HKP-19117$579.95