March 3rd, 2015

AR-15 Bolt Sheds Lugs — Can You Figure Out What Happened?

AR15 AR-15 Bolt lug shear damage Kaboom gas system pressure

Black Rifle Gone Bad…
Take a close look at this AR-15 bolt. Notice something missing — namely all the lugs? A healthy AR-15 bolt has seven (7) bearing lugs (plus an extractor hump). For all seven lugs to have sheared “clean off”, something serious must have happened to this bolt assembly. The folks at Brownells published this “lost luggage” image on Facebook to spur discussion. So, you AR experts out there — what do you think caused the problem here? Was it over-pressure, metal defect, headspace problem, gas system malfunction (or some combination of issues)? Post your theories in the comment section below…

AR15 AR-15 Bolt lug shear damage Kaboom gas system pressure

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May 19th, 2012

Gear Review: Action Cleaning Tool Kit from PMA Tool

PMA Action Cleaning Tool Kit Review by Danny Reever
I’ve been playing with the PMA Action Cleaning Tool Kit for about a month now. Previously, I used one of the old style (round knob) Sinclair action-cleaning tools with cylindrical cotton rolls. With the Sinclair tool, I was pretty satisfied that I was getting my actions reasonably clean. But, as I explain below, I think the newer PMA Action Cleaning Tool Kit is easier to use, and possibly achieves better results.

PMA Tool Kit Extensively Tested with Many Action Types
PMA tried a variety of options before finalizing the PMA Action Cleaning Tool Kit. PMA explains that several shooters did a lot of testing “with various sizes of die-cut foam, patches, felts and cotton rolls with various bolt action types (BAT two- and three-Lug, Kelblys, Halls, Remingtons, Winchesters and Savages). [Testers all agreed] that the foam disc is far superior to felts and cotton rolls [and] we decided to include two different sizes of foam discs.”

PMA Action Cleaning Tool Kit

The PMA Action-Cleaning Tool uses round foam discs in two included sizes: 1″ diameter and 1.25″ diameter. Both size discs can be used alone, or with a 3″ patch wrapped around them. The handles of the tools are CNC-machined blue-anodized aluminum with a silicone sleeve for grip. The PMA tool handles are a bit longer than those of my old Sinclair action-cleaning tool. I like the added handle length, and I find the design of the handle easier to use compared to the old-style round knobs.

The PMA tools are quality items. They are an improvement over my older Sinclair action-cleaning set-up. But do the PMA tools they actually clean the action better or easier than the old style cotton rolls? Well, based on my experience, the answer is a definite “maybe”.

Comparison Testing — Cotton Rolls vs. PMA Foam Discs (with and without patches)
Starting with the old-style cotton roll system, I cleaned my actions to a level I considered “clean” in the past. I then tried the included PMA foam discs. I found that, for my Remington-style actions, the larger 1.25″-diameter disc seemed to work better than the smaller 1″-diameter disc. Wrapping the larger disc with a 3″ patch definitely brought out more crud from my previously cleaned actions than the old style cotton rolls. Well, you might ask, what if you wrap the old-style cotton roll with a patch? Yes that will remove more crud too, but perhaps not as much as the PMA system. Moreover you would have to buy both cotton rolls AND 3″ patches. Not many places sell the cotton rolls.

Is it worth plunking down the $45.95 for the complete PMA system? Well, if you want to upgrade to a quality-made tool with better handles the answer is yes. Is getting that last bit of crud out of your action every time you clean it that important to you? You have to decide that for yourself. From my own perspective, I was due for an upgrade so the answer was easy. I like the PMA system, especially the new improved handles. Also, with the PMA system I don’t have to fool around with a tiny Allen screw to secure the cotton rolls — that was annoying. So my final take on the PMA Action Cleaning Tool Kit is that it is a good product with some real advantages over other action-cleaning systems.

PMA Action Cleaning Tool Kit

PMA Tool charges $45.95 for the complete Action Cleaning Tool Kit that includes a chamber cleaning handle and cotton swab. PMA offers the lug recess action cleaning tool by itself with four foam cleaning discs and five 3″ patches. Cleaning discs are also available separately in your choice of 1″- and 1.25″-diameter in a five pack.

Action Cleaning Tool Kit (complete): $45.95
Lug Recess Tool Only (includes 4 Cleaning Discs): $35.95
Chamber Swab Tool (includes Cotton Chamber Swab): $14.95
Additional 1″ Cleaning Discs: $4.95
Additional 1.25″ Cleaning Discs: $4.95

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