Skip to main content
Rock Island Auction Company
AuctionsConsignmentLatestFAQAbout us
Log InCreate Account
Rock Island Auction CompanyRock Island Auction Company
Contact us
1-309-797-15001-800-238-8022[email protected]
Locations
Bedford, TX
3600 Harwood RoadBedford, Texas 76021, USA
Rock Island, IL
7819 42nd Street WestRock Island, Illinois 61201, USA
Hours
Monday - Friday8:00 a.m. - 5:00 p.m.
Navigation
AuctionsConsignmentLatestFAQAbout usAccount
More Info
Terms & ConditionsPrivacy PolicyJob postings & CareersOrder a catalogContact
Social media
© 2025 Rock Island Auction Company. RIAC believes that this website is accessible to the widest possible audience pursuant to the guidelines of the Americans with Disability Act. Click here for more information.
Healthcare Transparency in Coverage.
Disconnected
Unable to connect to live update server, attempting reconnection. If this persists, please try refreshing your browser.
Disconnected state indicated by at top of page. If you cannot see this icon, you are connected.
Rock Island Auction Company
Hello.
Please Log In, or .

Home
Auctions
Consignment
Latest
FAQ
About us

  • /Auctions...
  • /Catalog...
  • /Lot 1364

Lot 1364:Qualified/HK SP89 Sear Host Combo, Class III/NFA Machine Gun

May 3rd, 2025|Bedford, TX
  • /Auctions...
  • /Catalog...
  • /Lot 1364

Lot 1364:Qualified/HK SP89 Sear Host Combo, Class III/NFA Machine Gun

May 3rd, 2025|Bedford, TX
Price Realized:
Login to viewLogin to view
Price obfuscated
Estimated Price$27,500 - $42,500
Log In to use Wishlists
Share

Qualified Manufacturing Auto Sear in a Heckler & Koch SP89 Host, Class III/NFA

A) Qualified Manufacturing H&K Auto-Sear, Class III/NFA Fully Transferable Machine Gun

Manufactured in Broken Arrow, Oklahoma, this individually marked and registered auto sear is fitted in a shelf pattern trigger pack, installed in item "B" of this lot and configured to match the housing markings.

ConditionExcellent, with minor wear. Appears to be in fine working order. NOTE: This weapon is a National Firearms Act (NFA), fully transferable Class 3, which is registered with the Bureau of Alcohol, Tobacco, Firearms and Explosives, (BATFE) under the provisions of 18 U.S.C. Chapter 44 and 27 CFR part 479.
Details
ManufacturerQualified Mfg
ModelHK
TypeMachine gun
Serial number
ClassClass III
Caliber / Gauge9 mm

Item LocationBedford, TX
Views762
Catalog page332

B) Heckler & Koch SP89 Host Gun in "MP5 PDW" Configuration

Developed in 1989 as a semi-automatic pistol variant of the firm's famous MP5K compact submachine gun, this item was later altered to match the "MP5 PDW" (personal defense weapon) configuration and mated with the sear pack described in "A". Hooded post front and four position notched drum rear sights, with the model markings and "IK" (1989) date code on top of the receiver, "8J IN" marked barrel, import marks on the right side of the magazine well, and "S/E/F" selector marking. The magazine well retains a functional paddle magazine catch, with a welded on "shelf", which the trigger housing has been altered to accept. As noted, the sear pack matches the safe/semi/auto markings, with a right handed selector and a bolt carrier modified with a welded-up sear trip to interface with the trigger pack. Fitted with a combination straight foregrip/hand protector, textured pistol grip, and a side folding Choate Tool buttstock.

ConditionVery good as upgraded and partially refinished to serve as a sear host, with minor handling marks overall. The furniture is very good, with some minor scratches and scuffs. Mechanical adjustment is needed; some play in the trigger housing causes inconsistent engagement between the bolt carrier and trip arm. NOTE: This item is a “host” for a NFA-registered conversion component, and will not be separated from that component for sale or shipment. The serial numbered receiver of this item has not been permanently altered to accept the conversion component, and is not called out by serial number on the paperwork for the conversion component.
Details
ManufacturerHeckler & Koch GmbH
ModelHK SP89
TypeRifle
Serial number
ClassModern Long Gun
Caliber / Gauge9 mm
Barrel4 1/2 inch round
Finishmatte black
Stocksynthetic
Bore conditionMinor spotting, otherwise bright with strong rifling.

Item LocationBedford, TX
Views762
Catalog page332
Find MoreRelated Items
Lot 401FN FNC 223 Sporter/S&H FNC Sear/Host Combo, Class III/NFA
View Lot
Lot 1339S&HFNC Sear/Host Combo, Class III/NFA Machine Gun
View Lot
Lot 1349HK Factory Original G3, Class III/NFA C&R Machine Gun
View Lot
Lot 400Original H&K MP5A2, Class III/NFA Fully Transferable Machine Gun
View Lot
Show More