Replacement Trigger for a Hi Point 995 Carbine

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A couple years ago I picked up a Hi Point 995 9mm carbine in a trade. Mine is a first-gen model in the ATI stock which copies the look of a Beretta CX4 Storm. The 995 is generally regarded as an inexpensive but reliable gun (unlike the pistols). However, like even expensive guns, they sometimes break.

The last time I had the Hi Point out the trigger failed to reset after a shot. To see what was wrong I cleared the gun, and when I removed the magazine a small piece of plastic dropped out. It was obvious that something had broken but the 995 isn't designed for easy field stripping, so I put it away. Later that week I had some time to take it out to my shop, and found that the trigger itself had broken around its pivot pin. Here's a pic of the action before I removed the trigger and sear cam.

HP995_action.jpg

Here's where the trigger broke.

broken-trigger.jpg

The trigger has a slot molded into the back of it. There's a small coil spring that provides pressure on the sear cam when it's assembled. It was difficult to get a clear shot of this.

trigger-slot.jpg

I figured that I'd make a replacement for the original plastic trigger out of aluminum, but when I went into my scrap box I found a piece of brass that was the right thickness and only a little too wide. I painted one end with Dykem layout fluid and after it dried, I traced the outline of the original trigger with a scribe.

trigger-blank.jpg

I left extra material on the bottom to provide something to hold onto while I finish the trigger. I shaped it to this point with a hacksaw, file, and my Dremel tool with a sanding drum. 360 brass machines easily.

After getting the outline done the next step was to replicate the holes in the original trigger. The three large holes are 0.110" in diameter for which I used a 7/64" bit, and the holes for the sear cam pin and pivot pin are 0.06", for which. I used a #53 drill.

trigger-holes.jpg

The next step is to make the slot in the back face. I did drill some pilot holes but decided that I really need a proper 1/16" end mill that can cut the slot up to 0.3125" deep. So, I ordered a couple cheap ones on eBay and had to wait to finish the trigger until I received them.
 
My 1/16" end mills arrived this week and I was able to spend some time out in the shop finishing up the trigger tonight.

Using an end mill to clean up the messy slot I'd made using a twist drill bit:

slot-cleanup.jpg

After I was finished cutting out the trigger I needed to clean up the bottom edge. I used an end mill to get right up to my scribed line.

bottom.jpg

Finally, the new trigger next to the original one that broke:

new-trigger.jpg

I should get around to installing it later this week.
 
I am in deep envy of your shop. In my younger years, I did a lot of CNC machining but don't have access to those kinds of tools anymore.

You will probably have someone pipe up to point out that you could have just sent it back to hi-point and they would have taken care of it... but when you can make your own...:)
 
Dang!

That un-breakable, wear-proof, custom made brass trigger is SURE to ruin the collector / resale value of your Hi-Point!

Seriously, Very Nice Job!
And a least two 'Atta Boys!'

Rc
 
Hi-Point would have replaced that broken plastic trigger with another plastic trigger. I think Dave had the best solution.

But I can't resist mentioning for the benefit of others that making that trigger didn't really require a milling machine; a drill and a couple of files would have done the job in about a half hour.

Jim
 
Thanks, guys.

The mill made cutting the slot in the back face of the trigger a lot easier. I tried using drill bits but the slot looked awful. Once I got a 1/16" end mill I was able to make it look like a proper slot, not a series of interconnected holes.

to us who are lack education in machining, that's wizardry! You have mad skills... nicely done!

I am completely self-taught. I bought my mill and lathe last year. If this is something you're interested in there are a lot of good, free resources online for learning. The imported benchtop lathes and mills are affordable and fit in small spaces. My shop is a 12x12 shed in my yard.
 
I got the new trigger installed last night. Getting the sear cam (the stamped piece connected to the back of the trigger) back in was a PITA.

HP995-new-trigger1.jpg

HP995_new-trigger2.jpg
 
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