What Makes DSG Uppers Superior In The Marketplace
What makes a DSG Arms Upper Receiver one of the very best upper receivers commercially available?
To manufacture a quality product made up of many sub-components/assemblies you need several things to be successful.
First, you must start with quality parts if you expect the final product to be of the best quality. Quality parts are either manufactured in house or sourced from reputable vendors in the USA. There are large supplies of sub-standard and imported parts currently in the market. DSG is aware of this and uses only high quality, American made parts. Parts that are made to a high standard using quality materials and "best practice” manufacturing techniques. Even when sourcing parts from top tier manufacturers, DSG Arms still relies on independent quality control inspections on these parts prior to installation on our complete upper receivers.
Start gas block roll pin
The second factor when determining the quality of an upper receiver is the attention to detail given during the subassembly and the final assembly process. Subassemblies include such things as port door and forward assist installation on the upper receiver. Non-marring fixtures are used to prevent the finish from becoming damaged during the installation process. Gas tubes and gas blocks are checked for obstructions before being pinned together. Barrels are drilled to allow the rear set screw on the gas block to rest below flush and grip the barrel preventing any movement during recoil. Drilling the barrel for the gas block is a service DSG only performs on barrels that are being installed incomplete upper receivers and is not an option for customers purchasing a barrel assembly as a sub-component. Bolts used in upper receiver assemblies are checked for proper extractor and ejector tension.
Anti-seize on Barrel extension
Final assembly is performed by installing anti-seize to the barrel extension before it is seated into the upper receiver assembly. Anti-seize is also applied before the barrel nut is installed. The purpose of the anti-seize is to prevent galling between the two dissimilar metals, the steel barrel extension, and barrel nut and the aluminum upper receiver. Once the barrel nut is properly secured it is checked for a minimum torque specification and a bolt carrier assembly is inserted into the upper receiver to ensure that the barrel did not rotate in relation to the upper receiver as the barrel nut was being torqued in place. Any rotation will cause binding between the lugs on the bolt and the lugs on the barrel extension. We have performed two quality assurance checks already and have only installed the barrel. Next, the gas block is slid into place and the 2 set screws dipped in high temp thread locker to prevent them from backing out under vibration.
Check gas block alignment
The gas block is timed to the upper receiver to ensure that it will be centered in the handguard. Once the gas block is timed the set screws are tightened down a final time. Next, the handguard/rail is installed per the manufacturer’s specifications. This often involves heating the rail before it is slid over the barrel nut as it is a press fit. The rail is then pressed in place using a non-marring fixture to prevent damage to the finish on the rail itself. Regardless of which brand of rail is installed on the DSG Arms upper receiver, the rail is timed to the upper receiver allowing a smooth transition from the receiver to the handguard. Once the rail is timed to the upper receiver the bolts/screws/fasteners that hold the rail to the barrel nut are torqued per the manufacturer’s specification and thread locker is used if the manufacturer calls for it.
Install and time flash hider
Next, the flash hider is installed and it is timed with the upper receiver/rail as well. Finally, the nearly completed upper receiver is cleaned of any excess oil, thread locker, anti-seize, etc. that may be present and it has its bolt carrier group inserted and it is ready for test fire. If you watch the internet videos, any person with the minimal mechanical inclination can assemble an upper receiver. The truth is that the persons working for DSG Arms doing sub-assembly and final assembly each have several hundred hours of factory taught armorer school time under their belt.
Most of our armorers work for law enforcement agencies and understand the consequences if they try and cut corners during a build. If it is not good enough to issue to their own officers, it is not good enough to sell to someone else. This must be the mindset as many of DSG’s customers are in fact Law Enforcement Agencies, Officers and Professionals in the field who are purchasing these products for duty use. They are counting on us to provide a sound, reliable product.
The final step is to test-fire the upper receiver for functionality. This is pretty straight forward but it is something that is not routinely done in the industry. Each upper receiver assembly that is sold with a bolt carrier group is tested in the following way. The upper receiver is unboxed, a charging handle is installed and the upper receiver is affixed to a Colt LE6920 registered SBR lower receiver that is completely stock with a Colt “H” buffer installed. The reason we test using this lower receiver is that Colt is the industry standard as they own the TDP for this weapon system. Each rifle is tested firing 5 rounds of 55gr. ball ammunition fed from a 30 round GI aluminum magazine; CAGE Code 33710. Once the upper receiver is fired 5 times with the ejection pattern acceptable and the bolt carrier locks back on an empty magazine, the upper is separated from the lower, the charging handle and BCG are removed, a bore snake is pulled through the barrel and the BCG is re-installed. The upper is then placed back in its box and the packaging marked to reflect the fact that it has been test-fired. The upper receiver is now ready to be sold and is placed in the warehouse.
7 uppers ready to test fire
As you can see, there are many inspections performed during the manufacturing of not only the final assembly but also the many components that make up a DSG Arms complete upper receiver assembly. The quality of the assembly process comes from the experience of the builders and the systematic approach taken to final assembly. Finally, no complete upper receiver with a bolt carrier group will ship to a customer without being test-fired. It doesn’t matter if the eventual end-user is an agency, an individual officer, security personnel or a civilian. We feel that THIS is what makes a DSG Arms Upper Receiver one of the very best commercially available upper receivers on the market.
The guy that does the building and test firing.