Tubb Precision AR-15 Carrier Weight System
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The Tubb Precision CWS™ is a simple drop-in part that greatly enhances the functionality of AR-15-type firearms in extreme shooting conditions. The CWS™ fits all AR-15 bolt carriers, and also those for the AR-10 and SR-25.
The addition of weight to the carrier slows its rearward start upon action cycling. Technically, it increases the "moment of inertia," but that simply means that the rifle will stay "locked" a little longer. This additional time reduces the influence of pressures on the cartridge case and also softens rearward carrier movement. The result is better brass life, fewer "pressure problems," and greater flexibility in velocities attainable using all bullets -- especially the heavier bullets used in High Power Rifle competition.
There is also noticeably less rifle movement during firing and longer parts life from a softer recoil pulse. The rifle stays on target better, effectively giving the shooter more time to focus on shooting a higher score.
The CWS™ improves rifle function, so there are no worries about extraction or feeding failures. As a matter of fact, a well-known tester found that a 40-grain bullet load that wouldn't cycle in his AR-15 worked flawlessly after he installed a CWS™. A CWS™ in no way affects the amount of gas available to operate the rifle.
The CWS™ also incorporates a flange that serves to secure it in the bolt carrier, but this also significantly reduces carrier overrun past the bolt stop. Reducing the distance the carrier must return to engage the bolt stop extends the life of this part and further reduces the amount of rifle movement apparent to the shooter. This is of special help to the AR-10/SR-25 owner since these rifles are notorious for breaking bolt stops.
This little part provides a majority of what extensive (and expensive) gas system modifications accomplish (such as relocating the gas port) but it's easily and "legally" installed in a Service Rifle. It even further enhances the performance of a longer-barreled Match Rifle, whether or not gas system modifications have been made.
Number of Reviews: 2
- kevin
- 2011-12-03
I ordered the CWS for my AR10T in .260
I was getting some ejector "smearing" on the case even with a low starting charge of H4350 and 123 scenar bullet. I thought the rifle was over gassed and the timing needed to slow down a bit and give the case time to contract before being ripped out of the chamber, while the case was still gripping the chamber walls. I was going to get an adjustable gas block but thought I should try weighting the BCG first.
Well the TUBB CWS was the simple answer and it worked great. The same load now shows no smear and I gained an average 22 FPS.
Very well made product,drop in part, that works.
- Andrew
- 2011-10-25
I recently purchased both a CS Buffer Spring and CWS for my AR 15 Service rifle. I began experiencing failures to feed with stock components. Function is much smoother and softer feeling than before. I have not had a failure to feed since installing these components. Fired brass is in better condition and accuracy is better as well.
Shot-to-shot performance in HP rapid fire events appears smoother, the bolt seems to stay locked longer separating recoil and cycling nodes which facilitate improved follow-through and return-to-target on the short line (using 75 grn Hornady BTHPs).
I have seen a slight increase in scores at 600 yards using these components (80 grn Hornady Amax), with demonstrated accuracy improvements at 300 yard tests. Brass at the long line is in better condition as well-primers show much less stress than previously with the same loads, which I attribute to the bolt staying locked longer allowing the rifle to extract/eject under less pressure than before.
I rated the products only 4 stars as I have only used them for a few matches and a handful of practice sessions, less than 500 rounds expended so far with zero issues.
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