A.R.M.S. set about making a folding sight and integral gas block that would simulate the contours of the original factory unit. This saves weight and ensures that the gas block and sight will end up with the correct A2 front sight post height for compatability with any rearsight. This is one of the fastest deploying folding front sights available and is made of aluminum for light weight and durability. Folding is accomplished by pressing down on the top of the angled portion whilst pulling back on the front of the vertical post.
The ARMS 41BL is easy to install on standard Easy to install on .750″ diameter barrels. It utilizes; dual clamping rings clamped on with hex head bolts (wrench provided). The gas block is machined from steel and includes both a bayonet lug and rear clamping ring fitted drilled for a sling swivel pin (not included). The whole unit is given a uniform black finish to match most AR15s.
This unit is highly regarded in the AR community, but is slightly taller than most other folding sights when folded. It will therefore protrude above the level of most top rails when folded which some users dislike for aesthetic reasons. A non-bayonet lug equipped version of this sight and gas block combination is sold as the A.R.M.S. 41B and Brownells supply a bayonet lug for the 41B to convert it to the 41B-L variant.
Purchase an ARMS 41B-L Silhouette Folding AR Front Sight and Gas Block at Brownells, a name you can trust.