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  1. HK LONG GUN TALK
    Hi HK fam! I am getting ready to send my USC to Tom Bostic for conversion and recently acquired a UMP stub that included the front section as well. Two main questions here: Is the front stub used in Tom’s fuse job? I initially thought there weren’t any differences besides the vents milled in...
  2. HK PARTS AND ACCESSORIES FOR SALE
    All parts are new unless otherwise noted. Please feel free to ask questions or DM me with combine offers on multiple items. These are just parts I've been hanging onto and decided to clear out. For payment I accept USPS Money Orders, teller checks, and personal checks (for personal checks, I...
    $1 USD
  3. HK PARTS AND ACCESSORIES FOR SALE
    Selling a brand new USC receiver. Prefect for your UMP kit build. $950 shipped to your FFL.
    $950 USD
  4. HK PARTS AND ACCESSORIES FOR SALE
    12-30rd UMP mags chambered in .40 all restricted stamped. Excellent condition. $45 each plus shipping. 2- Brand new 10rd USC .45 mags $45 each 1-Brand new USC .45 barrel. Factory takeoff from unfired gun $260 shipped $10 ships up to 6 I accept Zelle, Cashapp, ApplePay
    $45 USD
  5. HK LONG GUN TALK
    What do you guys do with the old stock and mags. Does anyone buy them? I was thinking about making a beer coaster or a Christmas ornament out of the HK on the stock.
  6. HK LONG GUN TALK
    This past weekend I ran some drills. And found the magazine changes on my usc to be rather frequent, and 2 mags to be a little limiting. With h&k 10 rnd mags being pricey and small, and me living in a state with no cap, I've looked into other options. This led me to the ProMag offerings. I have...
  7. HK LONG GUN TALK
    TLDR: Me + USC stock = bad. What good? I am looking into changing the stock on my usc to reduce my drill time, and I was wondering what yall's expert guidance would be. This post will be a little lengthy as I brain dump, so feel free to just address one portion if you have the time. To state...
  8. HK PARTS AND ACCESSORIES FOR SALE
    Used but in great shape USC bolt and barrel. Barrel was cut to 6.62 and threaded in 16x1lh. This shorter cut allows the use of your personal 3 lugs while keeping the total length around 8 inches. Both have had about 700 rounds thru them. The barrel does not come with the 3 lug but will...
    $650 USD
  9. WANTED TO BUY HK PARTS AND ACCESSORIES
    FOUND-FOUND-FOUND As title says. Looking for an un-cut factory USC barrel for a project, name your price and we can work something out.
  10. HK LONG GUN TALK
    Hey folks, just looking to get confirmation or recommendations on my USC to UMP conversion plan and parts list. Hopefully I'm not missing anything. Any personal anecdotes or lessons-learned welcome! PARTS LIST: USC (duh) FBI UMP lower Demilled rear receiver (4 in. min. for fuse) Lower receiver...
  11. WANTED TO BUY HK PARTS AND ACCESSORIES
    Hey there! Looking for a UMP rear demilled section for a USC to UMP fuse method conversion. Shoot me a PM! Thank you!!!!
  12. HK PARTS AND ACCESSORIES FOR SALE
    All parts are for the HK USC/UMP platform unless noted/ All prices include shipping. Will take venmo/PP. SEF Tactical dual magazine clamp for UMP45 mags. Excellent shape. $75 $50 SOLD HAGA Defense extended quad rail. Includes all mounting hardware. Excellent shape. $275 SOLD
  13. HK PARTS AND ACCESSORIES FOR SALE
    Cleaning out the safe of a bunch of stuff I should have parted with years ago. Let me know if you have any questions. Shipping will be calculated based on location. All parts are in Orlando, Florida. G36 Tungsten filled bolt carrier - $450 Bought it on the forum a long time ago thinking it...
  14. WANTED TO BUY HK PARTS AND ACCESSORIES
    Im building a UMP clone and I need one so I can have Tommy cut and thread it Send me a message, im in FL
  15. HK CLONE TALK
    I am in the process of building a 45 UMP clone from Tommy. I bought a kit from hkparts and I am really in the gathering stage so far. I want it to be a pistol in 45 with a 3 lug. I thought that if i got the HDPS threaded 8 inch and the silencerco adapter (pics) it would be ok. Tommy said that...
  16. HK PARTS AND ACCESSORIES FOR SALE
    Make: HK - Heckler & Koch Model: USC Caliber: 45acp Location (city or county): Orange County - SoCal Price: $OLD Will ship (Y/N): Yes on buyers dime Other info: Up for sale is a like new HK USC Lower WITH Trigger Group, Stock, and 2 x 10 Round Mags. Only been to the range twice...
  17. OUTSIDE HK FEEDBACK
    Hi everyone, I wanted to post this information for some time and haven't had the opportunity to do so but better late than never. In brief, I had a locally recommended engraver attempt to put my approved Form I mandated engraving on my USC/UMP with the name of my trust and locality. What I...
  18. HK PARTS AND ACCESSORIES FOR SALE
    HK UMP Folding Stock - German - $169.95 Heckler & Koch German/US Made - Safe, Semi UMP Lower - 2 Position - $369.95 Heckler Koch/GSG9 UMP, USC Rear Stock Pin - German - $24.95 Heckler & Koch US Made Magazine Compliance Kit - UMP .45 - $19.95 HKParts.net Sear For USC, UMP & SL8, G36...
  19. HK CLONE TALK
    Hi everyone, I recently finished putting together a UMP clone in .45 using the Omega Gideon Shadow receiver. I took it out today for some first shots, put a mag in, charged it and got a click and no bang. When I went to cycle the gun, it was completely locked up, and had to be mortared to clear...
  20. HK PARTS AND ACCESSORIES FOR SALE
    Posted this for sale complete in the pistol for sale section, and have been recommended to just part her out for a quicker sale so that is what I'm doing. This is my UMP build that I have only had for a couple of months, I'm dissecting her to help pay for some Dental Bullsh*t. Everything is...
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