This is not the normal type of part we offer at Charlie's, but have received a number of requests. This is a take-off from a new factory upper receiver group or rifle, so it has been test fired at the factory, but otherwise new. The Colt low profile gas block essentially starts life as a full-sized A-frame A2 front sight post, and the sight part is ground off or shaved down to create this unique part.
While basic, it is probably the best LPGB on the block. It is pined into the barrel, and to do this by the book, the gas block should be virgin (not drilled), and then mated to a new virgin barrel. This one has been removed from a barrel, which makes it delicate to install.
We recommend you use a gunsmith to install, as the drilling and reaming must be exact, and you need to keep the top as close to 12:00 dead center to match the gas tube hole. This is not as picky as a sight post, but some reasonable alignment to azimuth is important. Also, the hole is tapered to match the taper pins (included) and is not a straight drill hole.
YOU MUST USE A VIRGIN BARREL, and not one which has taper pin holes drilled. Many of our customers ask, and it is a good question, as to whether the taper pin holes align one barrel to another. They do not. There is no standard position, so do not expect that you can remove a barrel with a drilled gas block (or FSB) and expect the next barrel to align to the holes in the gas block. You will be dissapointed.
All 100% Genuine new Colt parts. May contain oil (that is good)
Note: This item is rare to get in stock, you might take a look at the mil spec LPGB
Colt
Colt
LaRue Tactical