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Page AR-15 » AR Variants
AR Sponsor: bravocompany
Posted: 10/23/2016 12:29:55 AM EDT
Looking for recommendations for an adjustable gas block for an armalite AR-10 with a .750 barrel diameter.

It needs to be able to fit under a Midwest gen 2 ss free float hand guard. I would prefer one that can be adjusted through the holes in the handguard and secured with loctite vs a set screw that may not be accessible without removing the handguard.

Thanks!
Link Posted: 10/23/2016 1:08:50 AM EDT
[#1]
SLR is adjustable from the front. No set screw. Click adjustments.
Link Posted: 10/23/2016 1:29:34 AM EDT
[#2]
Thanks for the heads up 1811GNR.  It's a sweet looking set up.  A little on the pricey side for me especially if I have to buy a tool to adjust it.  But I'm keeping it on the list of options for sure.  Do you by any chance have one?  If so do you like it?
Link Posted: 10/23/2016 3:07:49 AM EDT
[#3]
I have 3 slrs.  There is no tool needed to adjust them other than an allen wrench.  I love mine.  Put them on a grendel, 308, and 6.5.
Link Posted: 10/23/2016 10:32:36 AM EDT
[#4]
Yep, SLR is very nice.  Adjusts from the front with a long allen key that is provided.  I got the clamp on model for my .750 Armalite.  
I noticed an accuracy gain when I installed mine...I've been very happy with it thus far.

Link Posted: 10/23/2016 12:06:42 PM EDT
[#5]
I run a double star on my .750 AR-10 and a PRI on my .875 both are of the same design. I like them....
Link Posted: 10/23/2016 1:05:59 PM EDT
[#6]
Thanks for the feedback. Between your endorsement, and the accuracy increases reported by Bjwar10, the SLR is becoming a more and more attractive option.

You guys mind posting your specific model?  I looked at their site and there were a lot of different ones.

Provided it fits under my handguard I may just go this route unless a few others have different recommendations.
Link Posted: 10/23/2016 2:04:10 PM EDT
[#7]
You will need the Sentry 7 (the 7 designates the .750 barrel).  

As mentioned, mine is the clamp on.  It is on a 20" barrel with rifle length gas system.  I've found that with factory loaded Hornady 155 AMAX, I can set the adjustment on 8 clicks (I believe 15 is all the way open).  It will actually cycle on 7 clicks but I opened it up one more just to make sure.  It will also cycle South African and PORT surplus on setting 8.  If I run a suppressor, I can turn it down to 6 clicks and still function reliably.

As for the accuracy gain, no one I've talked to can definitively say the cause but a couple of theories were that being overgassed caused the BCG to begin moving before the bullet is out of the barrel...not necessarily unlocking but moving rearward to begin the process of cycling.  With less gas and pressure the BCG stays still for a longer period of time and thus not having extra movement to affect accuary.  Another thought was that dropping the weight from the factory Armalite gasblock to the much lighter SLR changed the barrel harmonics to one more suitable for my gun and ammo.  Both are interesting but my small brain doesn't really put a lot of faith in either explanation or the blind luck involved in gaining accuracy.  All I know is that my rifle (which was already fairly accurate for a "factory" gun) went from a 1 - 1.5 minute gun to a .5 - 1 minute gun with the AMAX.  Even the surplus dropped from 2-3 minutes to 1.5-2 minutes so for now the only thing that changed was the gasblock so that is what I'm giving credit to.
Link Posted: 10/23/2016 8:46:49 PM EDT
[#8]
Thanks Bjwar10.  I'm going to take a closer look with the specs and see if I can guestimate if the Sentry 7 will fit under my handguards.

Met a fella at the range today that recommended the Odin Works Gas Block.  Going to look into it as well.  Sounds like it has a similar design.
Link Posted: 10/23/2016 9:15:52 PM EDT
[#9]
I have the slr on my Def10 and really like it.
Link Posted: 10/23/2016 10:36:43 PM EDT
[#10]
I plan to use a microMOA govnah on my 16" aero
Page AR-15 » AR Variants
AR Sponsor: bravocompany
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