4.3.0.0 Welding / Installing the Trunion (barrel), Charging Tube and Rear Sight
There is a unique relationship between the Trunion (that has the barrel and Front sight), Charging Tube and Rear Sight. Before I weld up any part, I mock up and check for fit and correct alignment.
4.3.0.1 Preparing the Trunion
Clean the Trunion for any oils and grease. I use liquid Tide laundry detergent. Degreasing facilitate good welds.
Buff out any material left over from the spot welds on the trunion that may obstruct the trunion from being inserted smoothly. Do not over clean or polish Trunion surface as that may decrease the size, which may result as a wobble or play when inserted into the receiver before welding.
