TWS Gen.II AK Scope Mount Review

[Suburban]

Link to full version of the review, with photos linked to larger photos, and more links. I've spent a good deal of time writing, editing, re-editing, and taking photos for the review. It was 3 pages in Microsoft Word before adding pics and some additional content. I'm not trying to lure anyone in for advertising, as my site/blog has no advertising. I just don't have time to edit links for multiple forum formats. I'm not sure the forum owners want the whole thing taking up server space either.




Return-To-Zero
The TWS mount is supposed to hold a zero, through the simple machine elements described above, and, for the most part, it does. After sighting in, I flipped the mount/dust cover up, and unseated the take-down button/recoil spring guide, and then I buttoned everything back up again and vigorously racked the bolt carrier a few times. I did this return-to-zero test a couple of times. The first 2 or three shots would go a little bit to the right before the recoiling bolt carrier fully seated the take-down button/recoil spring guide against the rear of the dust cover/mount. After those first few rounds, the bullets would start going through into 10-ring again. At 12 paces the difference was maybe half an inch for the 1st round. I can live with that.

This testing was done without fitting the recoil spring guide to the stock trunnion. Return-to-zero may be better now that it’s fitted -- more on this when I get to installation.

Installation
The mount didn't come with any instructions. Having read through the ak47.net forum thread, and seen a YouTube video on how to remove an AK rear sight, I knew what I had to do. That TWS Gen. II Scope Mount thread currently stands at 69 pages, and it's still going. The mount should come with an instruction sheet, it's not a simple drop-in/bolt-on installation. I was able to get the mount installed in 25-30 minutes, with a lot of that time spent fighting to get the hinge pin installed against the sight spring pressure. Like I said, the pin fits tightly, and forcing everything into place took some real effort. Removing the rear sight from my rifle was not as easy as shown in the video either, so that took maybe 3-5 minutes, instead of about 2 seconds. Getting the recoil spring removed from the Tantal take-down button/recoil spring guide, and reinstalled on the button/guide supplied with the mount was easier than I had expected, but remember, there were no instructions included, and I was working on prior knowledge from reading 50+ pages of forum posts. Without knowing what to do, it would have taken a whole lot longer.

I did get the mount installed on the Tantal without cutting or filing anything. It should be noted however, that fitting the TWS recoil spring guide may be necessary or even required. The Gen.II mount worked pretty well on my rifle with no modification, but I don’t think stoning/filing the bottom of the TWS recoil spring guide hurts anything, and I’ll feel better knowing that there’s nothing to keep the mount from locking down snug.


Stock TWS spring guide. Note that both screws are showing.


Romanian Spring Guide. See how far back it goes?


TWS spring guide with the bottom filed/stoned down some. Note only one screw fully exposed now.

Co-Witness
The rail sits very low, allowing some micro red dot sights to co-witness with the iron sights if you get the TWS peep sight. With a real Aimpoint Micro, the iron sights show in the lower 1/4 of the tube. Heights of the tubes of the Aimpoint micro clones often sit higher up and may not allow co-witnessing with the iron sights. By all accounts the Bushnell TRS-25 micro red dot sight will co-witness, and runs $75-90 some places. The Primary Arms Gen.7 Red Dot, with the non-removable mount, may also co-witness, but the TRS-25 seems to be more common on the TWS Gen.II Mount.

Putting the rail on top of the dust cover gets the rail very nearly as low as on an Ultimak Scout Mount. It is lower than the other Beryl-type rails made by Kreb's ($300!?!?), DPH Arms, UTG, or Red Star Arms.

Balance
The TWS rail doesn't add any more weight up front, like a 3 or 4 rail handguard. Think about it. Almost all the weight of an AK is forward of the pistol grip. Atxjax on the Glocktalk forum weighed everything, and found that the TWS mount only adds 1.04 ounces, 3.46 ounces with an Aimpoint R1.

Cleaning/Clearing Stoppages
The mount/dust cover flips up, hinged off of what used to be the rear sight block, the rear sight now being mounted on the rail on top of the TWS dust cover. No tools are required to release the cover, and lift it up, although the bullet tip of a cartridge, a pen, or a similar object can be used to push in the button of the recoil spring guide. If junk gets in behind the bolt carrier, you just push in the take-down button on the guide rod, and flip up the rail. The mount doesn't hinder cleaning or maintenance as much as a side-mount. You can still remove the gas tube for cleaning, and remove the handguard, unlike the Ultimak scout mount, which clamps onto the barrel and blocks the lever that releases the lower handguard.

Heat Transfer
I put 5 magazines through my Tantal with the TWS mount over the course of an hour. Although there was some heat transfer into the mount through the rear sight block, very little of the heat transferred into the Aimpoint. The red dot sight stayed more or less at room temperature.

I did the same thing with my WASR with the Ultimak Scout mount, and after five magazines, the mount of the Primary Arms red dot was starting to get quite warm. The Primary Arms sight held up to the heat, but I when I went to clean the rifle, I noticed that the sight was loose on the mount. I think the heat from the gas tube mount melted the threadlocker I put on the screw that holds it on the rail.

Live Fire
I got the Tantal out to sight in. The first trip to the range was mostly uneventful. I had to move the front sight a bit to the right to align with the TWS peep sight, but that's fine with me, because the front sight had been most of the way to the left, over toward the protecting wing of the front sight base. Elevation was almost spot on. The tip of the front sight is nearly at the top of the protective wings of the front sight base, but I was able to get the sights lined up for both 25 and 100 yard zeros (only one at a time, obviously, with just one aperture).

For the 2nd outing, I took my Polish AK-74 up north to indoor range for some rapid fire. Everything was fine, up until the last round of the last magazine I had with me. The bolt carrier stayed to the rear, which is weird, because AKs don’t normally have anything to hold them open after the last round. I didn't really think too much of it at the time. I tapped the charging handle, the bolt carrier slammed home, I dropped the hammer, and cased the rifle and cleaned up.

When I popped the cover open to clean the rifle at home, I found the “spacer” laying loose in behind the trigger. Half of the pin that was holding the spacer onto the recoil spring guide was rattling around in the receiver. I’m not sure where the other half of the pin went. Fell out, I guess. The top of the spacer had made some contact with the inside of the dust cover, removing some finish, but I don’t think any structural damage was done. If you scroll up, and look at the picture of the inside of the dust cover, you'll see two silver marks just forward of the square slot in the rear of the cover. Those silver marks were made by the tabs at the top of the spacer.


Oops! That's not supposed to happen.

I wasn’t crazy about the idea of a metal spacer in there anyway. I pulled the Blackjack recoil buffer out of my WASR-10, which didn’t need it anyway, and put it on the TWS guide rod. The buffer is that blue thing you see in the picture with the cover flipped up. Nelson of TWS is offering to send out solid recoil spring guides without the spacer. I think I’ll take him up on that offer. I’m afraid the whole spacer thing is giving him a bit of a headache.

There is another small matter of peening at the rear of the ejection port. I'm told that it's from ejecting casings hitting the dust cover on the way out, and I guess this must be true. I don't think it'll be an issue, but it's something I'm going to keep an eye on. Nelson at TWS says that that part of the dust cover work hardens, and the peening stops after a certain round count.


Sorry, I couldn't get a better picture. Camera doesn't do close-ups very well.

Conclusion
A little too early for me to say yet, but the TWS Gen. II mount definitely shows great promise. I'm looking forward to putting more rounds though the "new" Tantal, and really shaking down the new TWS mount. I like my "new" modernized Tantal.

[ViperHummel]

Well done. I just got mine on but have yet to make a range trip. I have heard of the same issues. Did your spring guide come with the metal buffer on it? Mine did.

Edit: never mind: I saw your full review and saw you involuntarily removed it. I may do the same. I want to get the blackjack in there. TWS says its not needed anyway.