HK Proshop : For the Heckler and Koch Enthusiast

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  1. Grease Gunner

    MP5SD conversions….been a long few days in the shop

    Spent a long day yesterday in the shop ….the parts came in to start on a PTR 9 “Classic” as well as a POF to convert into an SD-Hybrid. I also had the parts come in for a complete SD build from a flat. Also got in three B&T SD suppressors as well so they can all be used for testing on the guns...
  2. Grease Gunner

    MP5K-SD build

    While I was working on some PTR9-SD conversions for fellow forum members today, I decided to dig out an old Special Weapons MP5K receiver I have had laying around for awhile and play around with it…since I had the SD welding jigs kit figured why not. I had to replace the shelf that was on it as...
  3. Grease Gunner

    PTR to SD Conversion

    I’ve been building HK clone host guns for awhile and shooting the crap out of them to make sure they work and don’t come apart….I’ve also been building them for others as well. As you can see in the thread in the “HK Clone section” I recently did a conversion gun where I took a PTR 9R-608 (16”...
  4. Grease Gunner

    PTR 608 to SD conversion

    I have had several people ask if it was something I could or would do, so why not…let’s try it. This morning I started with a pile of parts and a stock 16” PTR 608 gun…4 hours later I had a fully functional SD SBR…..the worst part was I had to drill out the center of the barrel locking pin to...
  5. Grease Gunner

    HK MG4 and MG5 at SHOT Show 2023

    Got to get my hands on these impressive weapons yesterday while setting up at SHOT. It helps when you work for someone who knows the right people.
  6. Grease Gunner

    Fitting up an HK21E…

    Picked up this receiver back in the spring and it needed some minor stuff done to finish it out and then assemble. I found the correct HK feed mec, bolt, and barrel assembly as well as the correct stock, so now it’s time to start assembly. Still need the following to compete the gun: Ejector...
  7. Grease Gunner

    Modern take on the M23 light mount

    With the popularity of SD’s these days, and the amount of guys looking for the old school SureFire M23 clamp on light mounts, I came up with a single rail, modern take on the M23. This unit would allow you to mount a SureFire Scout Light (as shown) or be able to mount an IR unit as well. I...
  8. Grease Gunner

    MP5SD-Hybrid with new prototype rail unit

    Thought I’d drop a couple pics of one of the MP5SD-Hybrid guns I’ve been working on this weekend. I used one of the prototype integrated rear sight/rail systems that fellow a member on the other HK site came up with. This is the first one to be mounted on a gun and I must say it’s AWESOME! I’ll...
  9. Grease Gunner

    Shifted gears today due to missing parts….started on a 53SD-300 BO

    I was building a couple MP5’s and SD’s when I realized HK Parts failed to ship me the right parts for my order…..so I decided to start on a pet project I’ve been wanting to do….an HK53SD chambered in 300 BO….I think it’s coming together nicely. I cut down an RCM 300 BO barrel to 7” and...
  10. Grease Gunner

    Busy Weekend....G3, HK33 and HK53 builds

    Finally got back into the shop and spent the weekend catching up on builds and still have a backlog to work through. Here’s video of the G3, HK33, and HK53 host guns I built this weekend. The G3 has a PTR receiver I ordered in from Sarco and the 33 as well as the 53 were built on old Special...
  11. Grease Gunner

    WTB G3/HK91 flat

    I am in need of one for a project I want to start working on. For some reason they have all disappeared....making me wonder if I should bulk buy MP5 flats/weld kits while I can.
  12. Grease Gunner

    SOLD PTR91 OD Green pic rail

    Selling a used PTR 91 with pic rail and green furniture. Comes with 4 HK aluminum mags. Got it in on trade from a client. I’ve put 100 rounds through this and tested it with a sear. The gun ran great. $1050 shipped to your FFL Sold on another forum already
  13. Grease Gunner

    SOLD HK UMP 9mm magazines

    Decided I’m not going to go the UMP route so I’m selling off the mags I picked up. These are factory HK UMP 9mm magazines. I have 10 of these and would prefer to sell the all one shot, but will piece them out if needed $65 each shipped $312.50 shipped (5 mags shipped) $600.00 shipped (10 mags...
  14. Grease Gunner

    MP5SD light mount from concept to real life....

    I was playing at work with Solidworks and designed a clamp on suppressor mount with pic rail so you can attach a SureFire Scout or similar light. Programmed my CNC mill up today and made the prototype unit today. Between my cnc and manual mills it took some time but it looks good (least I...
  15. Grease Gunner

    Reverse Stretch K’s anyone??

    Figured I’d post up a few pics of the MP5K-Reverse Stretch guns I’ve been working on. One is the number one build (for me) of this variation and the other one is for a client. I’ll be going out for test fire after work tomorrow. Then it’s onto final finish of a couple more SD’s..... No rest for...
  16. Grease Gunner

    WTS Franklin Armory HK binary packs

    I have two Franklin Armory HK binary trigger packs on hand. $600 each plus shipping.
  17. Grease Gunner

    Today’s project.....MP5SD (regular one)

    Spent the day in the shop working on an MP5SD standard for a client in Texas. It still needs a few minor details (sling loop, engraved, color, etc) but it functions great on the bench and goes pfft pfft pfft just like it should. Going to put it on paper tomorrow after work. More to follow...
  18. Grease Gunner

    Gonna be a long day.....but I built a K

    I was out in the shop until 11:00pm last night working on an MP5K build. I need to drill out the spot welds on the front grip hanger and move it as I messed up my reference dimension for where to put it. Gonna take it out and test fire it after work then go home and fix that issue and engrave it...
  19. Grease Gunner

    MP5 goodness....

    I decided to take a couple pics of all the MP5’s I’ve built before a few of them go to their “forever homes” to be loved and cared for....yes I’m messed up in the head but dammit I consider these my children....I gave them life So I can use that old saying from my mother...”I brought you into...
  20. Grease Gunner

    It’s been a “pressing” day....

    Been out in the shop all day working on my backlog.....I pressed barrels, prep’d, rolled and welded flats.....in process are the following- 1-MP5K 2-MP5K-RS (Reverse Stretch) 1-MP5SD-Hybrid 2-MP5SD I’m hoping by the end of the week or the beginning of next week they will all be done. I’m at...
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