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Review of AK-Builders rail jig.

25K views 32 replies 28 participants last post by  ashhoe 
#1 ·
In a thread on another forum, where a guy was asking about an easier/better way of laying out the upper rails for trimming, I suggested that he try one of Curtis's jigs.
Another guy posted that he had tried one and ended up ruining a receiver because the inaccuracy of the jig caused him to remove too much material.

I had based my recommendation on the simplicity of the jig, the excellent reputation of Curtis's stuff and the feedback of others. Also I own several of his other tools and I had found that all did their intended job very nicely.
But I figured if I'm going to recommend a product, I really should have some first hand experience with it.

So I ordered up a rail jig and TG rivet removal jig, the only two tools that Curtis makes that I didn't already own. My experience was excellent.

Based on the comment on the other forum and my own measure twice, cut once philosophy, I left about .050 more material than the jig called for to do the final fitting by hand.

First coat the rails with dykem, align the front of the jig with the front of the receiver and secure with vise grips. After scribing the outline of the jig and removing it, I fired up the angle grinder.
After demilling I don't know how many kits and making a bunch of receivers, I've gotten pretty good with this tool, if I do say so myself.
If used carefully with a light touch, these grinders are capable of some pretty intricate work. Be careful here, These things will remove copious amounts of material in a heartbeat.

As I mentioned I brought it down to about + .050 with the grinder then switched to a file for the final fit.
After I put the jig back on and found it to be dead nuts on. I don't know what happened with the guy who complained about it being off, but when I clamped the jig back on, every cut was perfectly flush with the jig.
I have left the main part of the rail about + .030. I will finish fit that section after I have the crossmember installed. But it appears that, that section will also be right on the money after the final trim.

Years ago I made a 1.20 X 1.25 steel block that I use for supporting the inside of receiver when ever I need to clamp it. I then mounted the clamp in my bench vise for a nice stable support.
 

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#4 ·
We had two of the jigs at the Weaponeer AK build party. Everyone used it and no one complained. The receivers I did were right on and I would not trim another receiver without using it. In fact I used it again today for the AK9mm I just started work on.
 
#5 ·
I've used Curtis's layout jig for a while now. I find it lays out the cuts for the upper rails right on the money. My problem is accurately cutting them afterwards. I always try to leave them a little proud and file to fit once I have installed the trunnions and the center support. If I do it right things work like a charm.
 
#8 ·
Never a mess made
Where the blame was laid
By those who could clearly see
That the fault was only me.
 
#20 ·
Don't think so. It will never be the same as the $69 AMD days, but not over. Just over for the cheapsters. There are still plenty of kits available.
 
#21 ·
I agree rob, but the point I was getting at was this:
The average person could at one time buy tools, and kits to build several AKs for the same money of a mid to high end factory AK. THOSE days are gone forever (barring a change in current laws).
 
#29 ·
Thanks Chief Just ordered a few jigs and odd parts, Web site was a dream to use. Made ordering so easy I spent $100.00 more than i planned. This building of AK's is going to be expensive, i can tell. Bought a H/F drill press and its great for 1/8" and under but 1/2 inch in 1/2 inch steel choaked it. Went to Ebay and found a 400 lbs Wilton Drill Press for $150.00 (but 250.00 for shipping) so to make the freight cost reasonable i bought another 400lbs of stuff. After years of just collecting guns my new hobby will be to try and build a few.

Today i spent a lot of time getting to know my garage floor. If the door was open a passer by could have mistaken me for a muslim (no offense intended) for the amount of time i was on my knees with a hammer in my hand. You guys convinced me to pull tghe BBl. on my AMD Kit and drill out the rivets. Getting the BBl. pin out wasn't that bad with the BFH. Next to buy is a 20 ton press.
 
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