02-24-2013, 06:59 PM
One thing that will help you when installing the trigger guard roll pin is to bevel the edge of it before attempting to drive it in with your punch and hammer.
It also helps to support the lower receiver with a backstop so that your line of work is perpendicular to the bench surface, so I have wooden blocks that I use to position the lower flat to the work space.
Using a grinder on the roll pin will help you put a nice angle on it, so it starts right away into the hole. I've done them like this for the past 11 years, and it's night and day different than just trying to force the roll pin into the trigger guard ear, which many builders have broken off when pounding away on their lowers.
Speaking of receiver extension tubes, all are not created equal. The Colt, DD, and VLTOR tubes are forged units, whereas a lot of vismod parts out on the market are machined, welded, brushed, and anodized to look like one-piece. Even the M110 SASS has been shown to blow out the rear of the extension tube, so sourcing your parts is a more complex process than one would think.
I know that AA only uses forged extension tubes for carbines.
It also helps to support the lower receiver with a backstop so that your line of work is perpendicular to the bench surface, so I have wooden blocks that I use to position the lower flat to the work space.
Using a grinder on the roll pin will help you put a nice angle on it, so it starts right away into the hole. I've done them like this for the past 11 years, and it's night and day different than just trying to force the roll pin into the trigger guard ear, which many builders have broken off when pounding away on their lowers.
Speaking of receiver extension tubes, all are not created equal. The Colt, DD, and VLTOR tubes are forged units, whereas a lot of vismod parts out on the market are machined, welded, brushed, and anodized to look like one-piece. Even the M110 SASS has been shown to blow out the rear of the extension tube, so sourcing your parts is a more complex process than one would think.
I know that AA only uses forged extension tubes for carbines.