cncgunsparts.com

 Our upper are made to work in full auto as well a Simi, Just take a look at the videos we have on the web sight.

Our uppers were developed for full auto fire that is what got me into the sale of this caliber upper I was paying $700.00 Dollars for 1000 rounds of 223 for my transferable M-16 now I can shoot 1000 rounds of 7.62x25 for $130.00

We do make our uppers for AR-15 also so the people that purchase them for there AR-15 are getting the benefit of our research and development for the full autos

In testing the rate of fire in full auto with the 10 1/2" and 16" barreled uppers on A lower with CAR stock

with 9mm Car Buffer Rate of fire 469 RPM

Standard CAR Buffer Rate of fire 528 RPM

AAC rate reducer buffer Rate of fire 485 RPM

With a custom made brass buffer in a lower with A2 stock Rate of fire 400 RPM

No you don’t need to cut your spring or take weight out of the buffer, Our uppers will run on any standard AR-15 or RR M-16 lower all you need to do is take your upper off slid in the mag block and put our upper on and you are good to go

There are other uppers out on the market in 7.62x25 Cal. Some work in Simi good if you cut the buffer spring and remove weight from the buffer. And there are some uppers in blow back that sale for $400.00 to $600.00 but the 7.62x25 is a hot round and will tear up a lower faster then the 9mm without a ramped bolt.

Our upper is a gas operated upper that uses the same carrier as a 223 upper and works the same so the lower is safe. No braking hammer pins or the pin holes getting egged out.

What you need to remember is you get what you pay for, Our upper were made ro run on full auto lowers.

 Any lower that is set up for use with a 223 upper will work with out upper

The lowers set up for 9mm will not work with the 9mm hammer in them but you can change out the hammer to a 223 hammer

Our uppers have a custom gas system that works with standard buffer and springs

And our uppers have our custom patented feeding system for the 7.62x25 round which is only offered by our company. The standard 223 feeding system is not reliable when feeding the 7.62x25 round

Also the patented mag block our company offers is made to work with the feeding system and is made to hold up to full auto fire

the upper we sale are within the price range of other pistol caliber uppers

I have not seen a lot of complete uppers conversions for $600.00, If you purchase a 9mm upper you would pay around $400 to $600 for the upper then a bolt will run around $150 to $200, a charging handle $30, a mag block will run $200. One mag $20 That is a Total of $810 to $1030

And then 9mm ammo is going to run around $400 to $600 per 1000 rounds

So if you shoot 7.62x25 ammo at 130.00 dollars per 1000 rounds you would save!

9mm At $450 per 1000 rounds is a $310.00 dollar saving per 1000 rounds so if you shoot 3000 rounds of the 7.62x25 you will have saved $930.00 dollars

223 Remington 55gr 1000 round at $459.00 is a $329.00 Deller saving per 1000 rounds so if you shoot 3000 rounds of the 7.62x25 you will have saved $957.00 dollars