Sentry 7 Clamp On Adjustable Gas Block

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SKU:
SA7-CM
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SKU:SA7-CM

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SKU:
SA7-CM

Description

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

INSTRUCTIONS

12 Reviews

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  • 5

    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.

  • 5

    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.

12 Reviews

  • 5

    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.

  • 5

    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.

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