Bore Tech BTCC-35016 C4 Carbon Remover, 16 oz

This product removes carbon from the pesky AR bolt so well, better than other products and tools that I have tried. I use a swab to apply the carbon remover or a chamber brush since those fit into the bolt also. The carbon sits for a bit and then cleaning it out with the carbon scraper tool is easy. I would use gloves as with any of these solvents but it is not offensive in odor or feel. Clean up was easy. It works for the barrels too. It made barrel cleaning so easy and fast.

This has become my go-to for both rimfire and revolvers. This removes the carbon ring from my rimfire rifles like nothing else. I use a cotton mop.... Saturate and let it sit inside bore just forward of the camber for 10 minutes. If I stay on top of it then just a cotton patch to wipe clean. If I let it build up then I saturate a nylon brush and do a little scrubbing. On the revolvers it works great to get the carbon off the cylinder or the face of the inside of the frame where it builds up. Ordered a bunch of small nalgene bottles with precision dispenser tips so I dont have to just squirt from the larger bottle.

This review is going to be the same for all 3 Boretech products I ordered as part of their system. C4 Carbon Remover, Eliminator Bore Cleaner, and CU+2 Copper Remover: I don't enjoy cleaning guns, and tend to neglect them because of the time it takes to clean semi-auto DI guns, guns fired suppressed (nasty), and proper barrel cleaning of precision bolt guns. I will sometimes spend 3 hours on a barrel removing carbon fouling and copper if I do the entire regimen. I hate it. I've been using a bunch of different flavors of solvents, copper removers, bore scrubbers, etc. Everyone kept mentioning Bore Tech this, Bore Tech that, whatever, I said. I was given some Amazon gift cards at work, and decided to finally try them out. I just took a 750 round defensive carbine class, which I shot entirely suppressed out of an LWRC SBR. As many know, suppressed shooting deposits a lot of carbon everywhere regardless of the fact that it's a piston-driven gun. I was dreading the cleaning process but decided to wait on the Bore Tech products to arrive. I started by putting some C4 Carbon Remover on a patch and began working it into the BCG, inside the upper receiver, and barrel extension. I wasn't planning on cleaning the barrel, so I just took a chamber brush and soaked it in C4, gave it a few turns in the chamber, and grabbed a rag to wipe off the upper receiver. I wasn't expecting much, since I normally have to scrub with brushes and elbow grease. The rag came off black and removed every last bit of carbon just by wiping it off. I couldn't believe how effective it was. The carbon was just melting off. I cleaned the entire gun with just patches, q-tips, and a rag in less than 15 minutes. At this point, I decided to clean the muzzle, which consists of a Surefire CTH Warcomp and a carbon-locked suppressor. Since I'm not at the range at this point, I can't shoot off the suppressor, and it's locked in tight. I dribble a bit of C4 on the mount area, and within a couple of minutes, the can just slides right off. I finish clean the carbon off the muzzle device and decide to go full-retard and do the barrel as well. I started the barrel with one patch soaked in C4 to saturate the bore, then followed by 10 strokes with a nylon brush. Patch out the absolute blackness that comes out until patches are fairly clean. About 5 patches in my case. I repeat the process with a patch soaked in Eliminator Bore Cleaner. First patch comes out blue, as do the next 10 patches. (I haven't even started using the CU+2 yet). I repeat the process with Eliminator one more time, and patches are coming out clean. I decided to de-copper as well, since I'm already here. I repeat again the same soak, brush, patch process with CU+2 Copper Remover and patches are showing just a slight hint of blue. (I use nickel-coated jags, so no false positives from the jags) I end with another wet patch of Eliminator just to clean out the copper remover (no ammonia, so I don't think this step is necessary) and dry patch with 4 more patches. Patches are completely white. (I also bore-mopped the chamber to get rid of the previous cleaning process) Put the gun together and there is no hint of this gun ever being fired. It's that clean. I think all in it only took one hour. Well-worth getting the whole system I think, although the CU+2 is probably overkill, as Eliminator can remove quite a bit of copper as well. I was most impressed with C4, cause it melts carbon fouling like it's butter. It's great to clean muzzle breaks and DI receivers.

Works great

Excellent bore safe carbon removed. Also great for removing carbon from action and internal components.

Works great on stubborn carbon rings left in rimfire rifles.

Great product.

I’m a big fan of Bore Tech’s other cleaners like their Eliminator and Rimfire Blend. I use their C4 Carbon Remover for stubborn jobs like carbon rings, AR bolts, and muzzle devices. I recently got a high end rimfire bolt gun and between scope zeroing and barrel tuning I shot 150 rounds in one sitting. I got home and scoped the bore to see how dirty the chamber and bore got and how bad the carbon ring was. Based on my other rimfire bolt gun I’ve gotten great results with a 10-minute soak, dry patch down the bore, another 10-minute soak, then one final dry patch. I haven’t needed to hit the chamber or leade with a nylon brush to completely remove the carbon ring. This stuff simply works with minimal effort on your part. Plus it’s odor-free.