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TROY INDUSTRIES
AR-15 GAS BLOCK LOW PROFILE

812699010136 100004062

Description
Ratings (13)

Won't Interfere With Extended-Length Tactical Forearms

Minimal-profile replacement for factory front sight/gas block won t interfere with extended-length tactical forearms, while ensuring proper function of gas system for reliable cycling. Protrudes only .420" above barrel, covers less than 1" of barrel length, and adds only 1.4 oz. of weight. Compatible with M4-style carbines and M16A2/A3/A4-style rifles with any length, .750" O.D. barrel. Two steel setscrews keep the block securely anchored to the barrel to prevent shifting even under the force of full-auto recoil. Black oxide finish matches most factory barrel finishes.

SPECS: Carbon steel, oxide finish, matte black. .950 (24mm) long. 1.375 (3.5cm) overall height. 1.4 oz. (41g) weight. Fits AR-15/M16 with .750 O.D. barrel at gas block mounting position. Includes hex-head setscrews.

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Customer ratings for TROY INDUSTRIES AR-15 GAS BLOCK LOW PROFILE .750 STEEL BLACK

Number of ratings: 13
From brownells.com: 13
Average rating: 3.9

Troy Low Profile Gas Block (30/12/2009)

I mounted this on a 16" Daniel Defense barrel.VERY low profile. The install was perfect. The tolerances were exact. Tight fit but slid on easily with no play. After firing there was NO leakage around the gas tube. Could have paid more but could not have gotten a better part.

Looks Great and Works (27/01/2013)

I research a number of gas block and decided on this one. Glad I did. I had a bit of a problem getting it to slide onto my S/S White Oak Wylde barrel, but after a bit of 600 emory it fits nice and looks great sitting just in front of my Hogue Rifle length OverMolded Free Float Tube.

Excellent Block (03/12/2013)

Very lightweight, secure mount, and high quality.

ID too tight! (26/01/2014)

Bought this for my son's first build. ID is too tight and won't even go 1/4 down the barrel. Tried a little grease, tapping with a block, way too tight.
Maybe I just was just unlucky, but I'll try another product first.

Junk (30/01/2015)

Too tight. wound up scratching the barrel and bending the gas tube getting this off because it did not fit correctly. Too tight for barrel and gas tube hole too small. Now have to order new gas tube and gas block. Threw it in the garbage. Checked other higher profile gas blocks I had on this barrel and gas tube and they fit no problem.

Priced right, easy to install (20/10/2015)

I bought this, having read about fitment issues. It was too tight to just slip onto two barrels I had handy, so I took a piece of emery cloth and a hand drill to the inside for all of 20 seconds. Even without oil, it fit easily, but not too loosely. I don't think that was a lot of effort, and it seals well to the port. If it needed to be machined, I would give it a different review. For the price, ease of installation, and function, this is a 5-star block.

Easy to install, nice fit (20/12/2015)

I installed the Troy gas block on my Smith & Wesson M&P15i to use with the Hogue forend soon to come from Brownells.

Had no issues whatsoever. Easy to slide on, easy to line up with the gas port. Great value for the money.

The most difficult part I had was punching out the pins holding the A2 front sight.

<img width="500" src='/userdocs/reviewimages/998827b4-13f3-4681-9711-49cb537120d4.jpg' alt=''>

<img width="500" src='/userdocs/reviewimages/f92e56b0-b258-4bb2-a370-7330df4dd2e1.jpg' alt=''>

Caliper Measurements (19/01/2016)

Here are some measurements that I took, for those of you that are curious:

The gas port hole is between 5.45-8.77mm when measured from one end to the other (from the shoulder). Any barrel with a gas port distance from the shoulder in this range will function (as long as the gas block journal is .750").

Overall height is 34.68mm/1.3655"

Width is 22.91mm/.902"

Length is 24.18mm/.952"

My closest estimate for the set screw distance is 9.75mm/.383". I'm very confident with this number, but it was hard to get an extremely precise measurement.

I put this on a Ballistic Advantage barrel 10.5" and it slid on easily. I have yet to fully install it though.

Fits a Ballistic Advantage Barrel (19/01/2016)

I put this on a 10.5 in Ballistic Advantage barrel BABL556005M and it slid right on. Some people have complained about it being too tight on other barrel brands, so I thought I would share my experience.

Awesome (27/05/2016)

Fit perfectly on my Rock River. Installation was a breeze and rifle cycling like it should. Fits well under small diameter BCM handgaurd

fit fine (25/08/2016)

I installed this on a DPMS barrel that I cerakoted and it fit just fine. it fit snug, just like it is supposed to.

Fits great. (05/10/2016)

Installed on a Criterion barrel with no issues. Everything lined up perfectly.

.004" Smaller than barrel (21/03/2017)

I don't normally use this product...a customer brought it to me to install, including several other parts. It was .004 undersize of the barrel...was not impressed. Will have to heat it to install it...shouldn't have to be that far off. Someone is not checking their machine setup it looks like.

Read 13 more ratings on brownells.com

54.9 54.9 1 GBP

Product no.: 100004062
TROY INDUSTRIES AR-15 GAS BLOCK LOW PROFILE .750 STEEL BLACK
Mfr Part: SGAS-A4L-00BT-0 812699010136 Minimal-profile replacement for factory front sight/gas block won t interfere with extended-length tactical forearms, while ensuring proper function of gas system for reliable cycling. Protrudes only .420" above barrel, covers less than 1" of barrel length, and adds only 1.4 oz. of weight. Compatible with M4-style carbines and M16A2/A3/A4-style rifles with any length, .750" O.D. barrel. Two steel setscrews keep the block securely anchored to the barrel to prevent shifting even under the force of full-auto recoil. Black oxide finish matches most factory barrel finishes.

54.9 GBP 0 £54.90 *

Is a 'Call to order' product.

Backordered, delivery time approx. 4-12 weeks from the USA warehouse.

Specs: Inside Diameter: .750 Make: AR-15 Material: Steel Style: Low-Profile

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Is a 'Call to order' product.

Top takeaways

The TROY INDUSTRIES, INC. AR-15 Gas Block is a low-profile, minimal-protrusion design that is compatible with M4/M16 rifles and ensures reliable cycling of the gas system.
It is constructed from steel with a black oxide finish, fitting .750" O.D. barrels, and is secured with two setscrews to prevent shifting during use.
The gas block is lightweight, adding only 1.4 oz. to the firearm, and is designed to not interfere with extended-length tactical forearms.

Attributes

Inside Diameter: .750 Make: AR-15 Material: Steel Style: Low-Profile Delivery weight: 0.068kg Shipping height: 10mm Shipping width: 69mm Shipping length: 97mm UPC : 812699010136