Upper Assembly - 1st time

ThePunisher

ThePunisher

CGN Regular
Rating - 100%
221   0   0
Location
Belleville/Kingston Ontario
I'm trying to put together my first upper for my AR. Normally, I just buy a complete upper and call it a day. However, this time is a little different. I purchased a lower from ATR, and while I wait for it to arrive, I've been picking up parts. I have a 20" HBAR barrel with a pooched gastube and no handguards. I also have a Colt A1 upper, but it is a large hole model. It has no forward assist or case deflector (it is an early model), but I do need to get a door assembly for it, as there is none. Honestly, I had planned on doing a flattop for this, but I have this upper, so I would like to make it work. Has anyone used the bushing to make the large hole upper fit the small lower? Is there a certain way that it goes in? Where can I get one of these bushings, as well as the gas tube and door assembly?
 
You can get one from Brownells its made by dpms.Its a pin and a bushing you use the bushing in the uppers hole to make it match the lower ,there 7.50$.
cheers tornado45
 
Check with Questar, IIRC, I think they had some listed on their website. In order to assemble your upper, you do know that you require a proper receiver block for use with a bench vise? Otherwise you'll defintely run the risk of crushing or otherwise damaging your upper. Check out the build thread at AR15.com and they walk you through the process.
 
You must log in or register to reply here.
Back
Top Bottom