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Your cart is empty.Lapping a receiver ensures a perfectly square and true surface for the barrel to mate against, thus enhancing accuracy. Also, honing the surface can produce optimal positioning of barrel nut so ideal torque can be achieved along with proper gas tube hole alignment
Shane S
Reviewed in the United States on March 9, 2025
Works as advertised. Trued up several uppers.
MelonLord
Reviewed in the United States on February 24, 2025
Did a great job lapping the upper on my AR-15.Made my rifle shoot MOA with a good barrel and 77gr ammo.
chris
Reviewed in the United States on February 22, 2025
As described worked good. It definitely trued up my receiver
Carr in AL
Reviewed in the United States on January 28, 2025
A lot of reviews mention "wobble." The included drill bit adapter is flexible, and I can see where that could cause some wobble if used out of concentricity. That was a horrible design choice, imo. I think Wheeler should have omitted the drill chuck altogether altogether. You're only lapping the surface material to even it up, not machining it yourself out of a billet block. Just use your hands.I did two uppers — a $200 Vltor MUR upper & a $40 Anderson upper — by hand, and it took about 5 min to knock them both out. Doing this showcased that many times, you truly do get what you pay for. The top upper in the attached picture is the Anderson and the bottom upper is the Vltor. Notice how evenly the Vltor upper lapped (because it was already square) and how off-center the removed material was on the Anderson. I've use Andersons uppers several times before, and I've never had a problem with them not working, but this shows you how out-of-true they can actually be.If trying to squeeze every bit of accuracy possible out of a build, this is an easy step to ensure full, even contact of the barrel shoulder to the upper for maximum consistency. Just DONT use a drill.
Peter Laub
Reviewed in the United States on August 31, 2024
This little lapping tool squares up the face with the bore line. Well worth the money and simple to use.
davemaj27
Reviewed in the United States on August 1, 2024
I purchased the tool to lap the AR15 upper to the barrel extension. Worked perfectly. I was surprised how many AR 15 Uppers are not perfectly square. This tool made an easy job to correct this problem.
Mark
Reviewed in the United States on April 30, 2024
Test fitting this tool on a new Aero upper, showed it was large/rough enough to damage the interior anodizing when only partially inserted.Also the lapping surface wasn't very smooth/straight.I have other Wheeler products that are great, but I would not try another one of these on any receiver again.
Dewey
Reviewed in the United States on July 8, 2019
The lapping tool works well; however it is not well balanced. Running it too fast results in vibration. The instructions tell you to turn it slow anyway, so follow the instructions. Prior to lapping the receiver, I did a prussian blue test on it there were low spots on the surface that mates with the barrel. It took less than 5 minutes to perform the entire lapping operation and it passed a blue check afterwards. Prior to lapping, I also took measurements of the lapping tool with a set of digital calipers and a square on a granite surface plate. The tool is consistent and accurate to at least .0001 and is square between the lapping surface and the pilot guide.
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