Adjustable gas block that will fit under a BCM MCMR Rail?

[Papa Pitufo]

Does anybody know of a 0.750" adjustable gas block that will fit under the BCM MCMR Rail? The MCMR rail has an ID of 1.3. Thanks.

 

[C_R_Slacker]

Superlative Arms should. They seem to be the same size as other low profile non-adjustable gas blocks.

 

[newguy2k3v2]

I would think a slr set screw version would fit.

 

[Spblademaker]

Sadly the Superlative won’t fit.

 

[Spblademaker]

Looks like the SLR sentry 7 set screw type should fit, based on their site.

 

[Darkside-Six]

JP is what I’m using

 

[MontanaMan]

I would think a slr set screw version would fit.

It does.............I used that combo on a recent build.

MM

 

[MPDS13]

I have several SLR adjustable gas block under BCM rails. They will fit just fine.

 

[C_R_Slacker]

View attachment 7173344

Sadly the Superlative won’t fit.

I bet it does. I've got a midwest handguard that also measures 1.3" inside diameter with a superlative gas block and it fits. I'm pretty sure they measure inside diameter from 9 o'clock to 3 o'clock, not 12 to 6. There is extra space where the top picatinny rail is.

 

[Spblademaker]

Good point. I have the same situation with an Odin Works handguard and Superlative adjustable block.

 

[C_R_Slacker]

I could be wrong, but if i had to put money on it, I'd say a superlative would fit. But, it's confirmed that an slr will, so might as well go with that.

 

[MisterW]

SLR Sentry 7 fits under just fine.

 

[AndrewO]

Superlative and slr set screw will both fit in an mcmr. Clamp on versions probably won’t though.

 

[nn8734]

Does anybody know of a 0.750" adjustable gas block that will fit under the BCM MCMR Rail? The MCMR rail has an ID of 1.3. Thanks.

Look into Syrac Ordnance gen 2 blocks. They fit inside a vast majority of hand guards and work well. They come with either a two set screw configuration or clamp style and fit .75” barrels.

 

[MontanaMan]

Look into Syrac Ordnance gen 2 blocks. They fit inside a vast majority of hand guards and work well. They come with either a two set screw configuration or clamp style and fit .75” barrels.

Syrac is out of business & has been for 2-3 years.

MM

 

[nn8734]

Syrac is out of business & has been for 2-3 years.

MM

Recommended based on my own experience, never had any issues with the three I have. Heard good things about Odin and SLR but haven’t tried them (yet).

 

[MontanaMan]

Syrac was good.............too bad they're gone. SLR works fine & are easy to clean (by design) if you take the time to maintain them.

Have not used Odin.

MM

 

[Papa Pitufo]

Thanks for the feedback. I'll look at the SLR and JP. Anybody that has used both recommend one over the other?