MickB Posted June 2, 2012 Share Posted June 2, 2012 Is the Syrac clamp on adjustable gas block supposed to fit under a JP hand guard? I received the clamp on style, and while the bottom clears fine, it looks like there is barely any clearance at the top of the gas block and the JP hand guard. Has anybody used the Syrac gas block/JP hand guard combo? If so, did you do anything to make it fit such as remove a small amount of metal from the top of the gas block? Mick Link to comment Share on other sites More sharing options...
abn-rgr Posted June 2, 2012 Share Posted June 2, 2012 It worked fine on mine and you will love it!!!! Link to comment Share on other sites More sharing options...
surfmaster Posted June 2, 2012 Share Posted June 2, 2012 I have the clamp-on version of the great Syrac Adjustable Gas block and it fits under my Seekins Precision MCSR rail. Just look for a rail with an internal diameter of around 1.75" and you'll be good. There's a small but sufficient amount of space between the top of the gas block and my Seekins rail. The gas block and its detent that needs to be depressed before you can move the set screw is a great design. Link to comment Share on other sites More sharing options...
MickB Posted June 2, 2012 Author Share Posted June 2, 2012 How much clearance have you got? It's real tight under my JP hand guard... Mick It worked fine on mine and you will love it!!!! Link to comment Share on other sites More sharing options...
abn-rgr Posted June 2, 2012 Share Posted June 2, 2012 Ill have to check when I get home, but it clears it barely. Never caused a problem. I also have one with a PRI tube with just a little more space. Link to comment Share on other sites More sharing options...
bmiller Posted June 2, 2012 Share Posted June 2, 2012 It was super tight under my older jp tube. Used the dremel on the forearm. It works fine. Link to comment Share on other sites More sharing options...
MickB Posted June 3, 2012 Author Share Posted June 3, 2012 (edited) I may have to go the same route. I can't slip a sheet of paper between the top of the gas block and the top of the tube... Mick It was super tight under my older jp tube. Used the dremel on the forearm. It works fine. Edited June 3, 2012 by MickB Link to comment Share on other sites More sharing options...
MickB Posted June 3, 2012 Author Share Posted June 3, 2012 (edited) Update with a couple of observations... After doing a little research, and comparing product pictures, I noted that the gas block I received has no markings or lot number whatsoever. It is completely blank. The screw heads on the gas block I received enter from the left side, versus pictures I have seen on other web sites (including JP's) where the screws enter from the opposite side. While the gas block from Midway came in packaging from Syrac, I am wondering if I have perhaps received an early model gas block? Anybody else's Syrac gas block look like mine where the screws enter from the left? Mick Edited June 3, 2012 by MickB Link to comment Share on other sites More sharing options...
Sleepswithdogs Posted June 3, 2012 Share Posted June 3, 2012 Mick, any chance you could post some pics of the gas block you received? Link to comment Share on other sites More sharing options...
prreed10 Posted June 3, 2012 Share Posted June 3, 2012 (edited) I used a set screw one under 15" Troy V-Tac handguards. It was tight on the bottom, mostly because the set screws stuck out too far. I replaced them with some shorter ones from Home Depot and the clearance is much better. Sorry, I just noticed your using the clamp on version. Edited June 3, 2012 by prreed10 Link to comment Share on other sites More sharing options...
MickB Posted June 3, 2012 Author Share Posted June 3, 2012 (edited) Here's a pic of the left side of the gas block, muzzle to the left of the picture.... Mick Edited June 3, 2012 by MickB Link to comment Share on other sites More sharing options...
Clint-M Posted June 21, 2012 Share Posted June 21, 2012 (edited) That's what mine looks like also, but I got it from Midway as well. I ended up keeping my JP low profile block on after not being able to find a handguard that fit with enough clearance for me so I'm probably going to let it sit until I build my backup gun. CM Edited June 21, 2012 by Clint-M Link to comment Share on other sites More sharing options...
MickB Posted June 21, 2012 Author Share Posted June 21, 2012 (edited) JP fixed everything on my upper at no charge and it is currently being shipped back to me. JP have been having issues with clearance themselves and are lowering the height of the gas block - modifying existing ones and making lower ones in new production runs. I'll update on what the work looks like and the amount of clearance. Clint, I suggest you talk with JP if your upper is from them, or give Jason Adams a call and see if you can't get a lower profile unit substituted... Mick Edited June 21, 2012 by MickB Link to comment Share on other sites More sharing options...
surfmaster Posted June 22, 2012 Share Posted June 22, 2012 I have the Syrac gas block with a Seekins Precision MCSR rail and there's enough clearance between the top of the gas block and the rail. Luckily, the top of the gas block goes slightly into the top slit that supports the top picatinny rail. I can easily put a piece of masking tape between the gas block and rail. Gas block works great. Link to comment Share on other sites More sharing options...
MickB Posted June 22, 2012 Author Share Posted June 22, 2012 From my discussions with JP, that is not enough clearance. We'll see how much mine has when it comes back on Monday... Mick I have the Syrac gas block with a Seekins Precision MCSR rail and there's enough clearance between the top of the gas block and the rail. Luckily, the top of the gas block goes slightly into the top slit that supports the top picatinny rail. I can easily put a piece of masking tape between the gas block and rail. Gas block works great. Link to comment Share on other sites More sharing options...
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