Gas Block was easy to install and didnt take long to get it adjusted just right for my AR, plus the customer service from SLR is very good too!!
Sentry .750" Clamp On Version - Melonite QPQ Finish
1.3 oz
US PATENT NO. 9,410,756
- 15-position adjustability from 0 - .125" port opening
- Metering screw and screw bore design allows repeatability and reliability only SLR has been able to deliver
- Single tool click to adjust gas metering
- Melonite finish 4140 Precision machined gas block
- Melonite finish 4140 Nexturn Swiss precision metering screw
- Stamped Alloy Flat Spring with 1400deg temper
- Melonite finish 4140 detent plunger
- USES STANDARD GAS TUBE
- Tool, roll pin and mounting screws included
NOTE- If using underneath 1.3" ID HGs we recommend using a set screw block. Will work with 1.35" ID HGs
Gas Block was easy to install and didnt take long to get it adjusted just right for my AR, plus the customer service from SLR is very good too!!
You will be happy with this block. Machining was top notch and installation was dead simple. A little Rocksett on the screws and it has held perfectly for 500 rounds. 10.5" sbr required 5 clicks running steel cased ammo to make sure it would reliably cycle. Once the system heated up, had one failure to feed. Added 1 more click and never had a problem after that with all types of 223 and 5.56. Noticeable difference in recoil and carbon during cleaning. I started at 2 clicks from bottomed out and loaded 1 round in the magazine. Fired and watched for the bolt to catch, it didn't. Repeated the process with one round and 1 click until it stayed open reliably (6 for me). It took maybe 5 minutes to get tuned. Very please, will be using these on all AR builds from here on.
Gas Block was easy to install and didnt take long to get it adjusted just right for my AR, plus the customer service from SLR is very good too!!
You will be happy with this block. Machining was top notch and installation was dead simple. A little Rocksett on the screws and it has held perfectly for 500 rounds. 10.5" sbr required 5 clicks running steel cased ammo to make sure it would reliably cycle. Once the system heated up, had one failure to feed. Added 1 more click and never had a problem after that with all types of 223 and 5.56. Noticeable difference in recoil and carbon during cleaning. I started at 2 clicks from bottomed out and loaded 1 round in the magazine. Fired and watched for the bolt to catch, it didn't. Repeated the process with one round and 1 click until it stayed open reliably (6 for me). It took maybe 5 minutes to get tuned. Very please, will be using these on all AR builds from here on.
Pros: - wide adjustment range (7.5" pistol and 20" rifle confirmed) - positive detents with good tactile feedback - easy to dial-in and manage recoil and over/under gassing Cons: - asymmetrical design makes alignment difficult - front adjustment may be blocked with larger muzzle devices - clamp screws are not pre-coated with thread locker First impressions are this is a well made and well finished device. The addition of index marks for alignment during installation and thread locker would make installation a little more convenient/easy. This is a great way to ensure a well tuned gas system, a 7.5" pistol required 4 clicks and a 20" rifle needed 12 clicks, of a maximum 18.
