![]() ![]() The internal rail gaps are checked once more. Gary pointed out that the neatness (or sloppiness) of the spot welding is usually a good indicator of how much time and care went into the rifle. The rails are clamped in place for a series of spot welds. The internal rails are longer than needed to allow builders to cut them to just the right length for their receivers. A 15/64 drill bit is just the right size to set the gap distance between the rails and the top of the receiver. The front trunnion is set into the receiver and held in place temporarily with rivets and tape to provide a reference point for positioning the interior rails in relation to the front of the receiver. The front and rear trunnion are bolted into jigs so that rivet holes can be drilled and deburred, just like a factory-finished receiver. ![]() It is now ready for the front and rear trunnion holes to be drilled and the internal rails to be spot welded in place. The bent stamping, now formed into a receiver, is removed from the jig and checked to ensure that it's properly shaped. The flat is bolted into a jig which folds the stamping into shape using the hydraulic shop press. MOD Outfitters applies their company name and a serial number to the flat before work begins. So, after the rifle was completed, I was invited back to the shop to see how an AK receiver is built from a flat stamping. Mike didn't want the readers who are considering building their own receivers to feel left out because we used a factory-finished receiver. ![]()
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