I have been wanting to make some proper AK SBRs for a long time and finally got around to it. I've been shooting my 107FR since 2008 which is a great rifle but I wanted to try something a little shorter.
It was on this forum many years ago that I first saw pics of a 107CR and 106CR and have been wanting to make some ever since. It took me awhile, I know I am way late to the game here but I finally did it.
I SBR'ed both an Arsenal 106CR and an Arsenal 107CR. 7.62 is definitely my preferred caliber in an AK and my favorite when I can go to my outdoor range. Sometimes though I can only go shooting at night after work at a local indoor range that allows 5.56 but not 7.62. With the 106CR then I can at least practice more.
I had a local engraver called Laserworx do the tramp stamp. They are awesome to work with, did the engraving while I waited, and even let me watch!
I e-filed the form 1's and got approvals in around 37 days.
I then had Adco cut the barrels for me. Steve did a great job with a very fast turn around.
The boosters are from JMac customs and fit both rifles perfectly. They do a very admirable job of cutting down the flash too.
The 107CR was reliable out of the box although the trigger reset was a little sticky at first. I think the disconnector was dragging on the hammer a bit but that seems to be smoothing out. Other than that the 107CR is great to shoot, very lively with the shorter barrel. I could be crazy but I think it is even more accurate now than before the chop. I have around 1000 rounds through it so far with no issues. I been shooting both GT and Wolf.
The 106CR needed a little more work to get running. The Arsenal disconnector broke clean in half at around 60 rounds. Arsenal sent me a new one which has since been working fine. It also had some problems feeding at first where the bolt wouldn't completely close. It took some researching but I eventually figured out that two factors were contributing to this: the charging handle was binding at the front of the dust cover and the finish on the rails and bolt carrier was really gritty, like rubbing two pieces of sandpaper together. I lightly filed the high spot on the dustcover and lightly smoothed down the finish on the rails and she has been 100% ever since. I have about 1000 rounds of UMC and Federal .223 and XM193 5.56 through it with no problems.
For anyone contemplating this, I say do it! They are much better in this state than how they come from the factory with the barrel sleeve. The balance is great and the lighter/shorter profile is very nice to shoot with.
Here are some pics:
107CR:
106CR:
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