Superlative Arms Adjustment Guide
Bleed Off vs. Restrictive
Using the right amount of gas pressure in the BLEED OFF mode has many benefits:
- Proper cycling of the BCG.
- Less felt recoil allowing for faster follow up shots.
- Less heat and carbon fouling keeping your DI system cooler and cleaner.
- Minimize wear on the internal components.
- Adjustment screw is not exposed to high heat, pressure, and fouling.
We always recommend using the bleed off mode to experience the benefits listed above. Running in restrictive mode may eventually erode and/or seize the gas adjustment screw from operating effectively.
Optimizing Your Direct Impingement System
The “Bleed Off” gas block comes to you with the adjustment screw in the closed position (zero pressure). From here you will adjust the block utilizing the 3/32″ Allen wrench provided.
Start by backing out the gas adjustment screw counterclockwise four and half revolutions or 18 clicks (4clicks/revolution). This is equal to a non-adjustable gas block as full pressure. A barrel manufacturer will port their barrels for a non-adjustable. From 18 clicks you have 30 more clicks of adjustment you can make before the patented exterior detent mechanism prevents the gas adjustment screw from coming all the way out.
Optimizing Your Direct Impingement System (continued)
This is a reference point so the end-user knows this is the last position of adjustment. Do not over-torque as this will damage the plunger.
Bleed Off Mode
Next, load 5 rounds into the rifle’s magazine using the lowest pressure ammo that you plan to use. Keeping your rifle pointed in a safe direction, insert the magazine and charge the rifle. In a safe manor, fire 5 consecutive rounds at your intended target.
Is Your Rifle Cycling Properly?
If you are not cycling properly, or not at all, STOP HERE. Please check to make sure you have adjusted the gas adjustment screw out to 4.5 revolutions. If yes, please check the installation of your gas system components. The gas block may be installed incorrectly or another variable may be affecting the operation.
Refer to Diagram
If Your Rifle is Cycling Properly, Where is Your Brass Ejecting?
- Brass Ejection Pattern – For a standard AR-15, if your brass is ejecting between 3-4, your gas system is optimized. For best results, dial it in between 3-3.5. If your brass is ejecting between 1-2.75, your system is over gassed. If your brass is ejecting between 4-6, your system is under gassed. An over/under gassed system can cause failures.
Failures can occur by the speed of the carrier coming back too fast. If you are over gassed, follow these instructions:
- Back the adjustment screw out counterclockwise until you bleed off enough pressure to achieve the recommended brass ejection pattern. If you are still over gassed at full-bleed off, we recommend using a heavier buffer and/or buffer spring.
Failures can also occur when there is not enough gas pressure to cycle the BCG properly. If you are under gassed, please follow these recommendations:
- Verify that you have followed the installation instruction correctly. Your gas block may not have proper coverage of the gas hole.
- Try running higher pressure ammo to see if you are marginal.
- Use a lighter buffer and/or buffer spring. If you are running a standard carbine buffer, you can remove/change some of the weight(s) inside the buffer.
- Add more back pressure with a muzzle device or suppressor.
- Check gas port size.