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HDPS CORP – The Home of Quality Heckler and Koch conversions services and parts since 2003, no aftermarket compromise!
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HDPS Bird Cage Hk Style Flash Suppressor for Hk UMP / USC SBR’s .45 ACP/.40 S&W/9mm for Threaded Barrels in M16X1 LH
$120.00 -
UMP/USC Long Top Rail and 2 Low Profile Screws
$40.00 -
UMP/USC Short Front Rail and 2 Low Profile Screws
$30.00 -
Sale!
UMP/USC Set of Rails/screws in blister pack
$125.00$110.00 -
Sale!
HK SL8 -1/4/6/10 to G36 Stock Block Conversion, steel screws included
$295.00$279.00 -
Sale!
SL8/ACR Block with Eyelet/Thumbhole screws / Hardware to mount ACR Stock/ ACR Folding/Collapsible Stock
$455.00$445.00 -
USA made by HDPS Steel eyelet and thumb LONG cross block with flat and eyelet screw (pair)
$48.00

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Heckler and Koch UMP and USC Trigger Spring
$7.75 -
Heckler and Koch UMP and USC Hammer Springs RH & LH ((N E W))
$18.50 -
AR-15 or Umarex 416 D – Carbine Faux Sound Suppressor
$125.00 -
Heckler and Koch UMP and G36 (all) Hammer NEW
$38.50 -
Heckler and Koch UMP Lower Release Lever Complete with spring and axle
$29.50 -
Heckler and Koch UMP G36 USC SL8 trigger NEW
$18.50 -
Heckler and Koch USC Lower Receiver w/ Bolt Catch & Mag Release mounted NEW
$69.95 -
Sale!
SB Tactical Brace Hk and B&T Folding Brace or Rifle Stock
$99.99$84.99 -
Sale!
STOCK BLOCK “B” for you Hk USC to Hk UMP conversion (Pin/Washer/Ring Style)
$165.00$155.00 -
Sale!
STOCK BLOCK “B” For your Hk USC to Hk UMP conversion (Eyelet and Thumb Screws)
$195.00$185.00 -
Sale!
Tactical Ventilated Foregrip TAL-4
$38.00$35.50 -
Sale!
Vertical Grip – Foregrip Foldable Five Position (Picatinny Rails)
$29.00$21.00 -
Sale!
HMMWV WEAPONS TRAY & HARDWARE (NIB) HUMVEE HUMMER M998 TURRET SLANT BACK HARDTOP
$500.00$455.00 -
Sale!
UMP/USC RAILS Set of Rails/screws in blister pack NO sharp edges (Copy)
$125.00$110.00 -
Sale!
Heckler And Koch UMP Lower Four Position
$450.00$425.00
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Homeland Defense & Police Supply Corp