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Posted: 9/20/2008 4:31:15 PM EDT
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6 months ago I bought a tapco reiever and rivet set. The intended build was going to be a bullpup kit. We bent it locally, but the guy that was teaching me didn't have a welder, so we couldn't weld in the rails. First thing that should have tipped me off that it was a junk receiver is that it would not bend all the way. no matter how much pressure we put on it, it still widened back out. Next problem was the rear rivet for the trigger guard kept warping out of place. So after three hours of messing with it, the original teach and I gave up. A few weeks later i commited to installing the front trunion. It went it pretty easily, as i didn't have to wallow open any of the trunion holes and every thing lined up. well what i didn't notice was that the mag well was not apparently cut correctly as the front trunnion overlaps the mag well enough to prevent any magazines from locking into place. Next problem came AFTER we welded in the rails today, and installed the center rivet. the center support was not long enough to keep the receiver walls from collapsing inwards during the crushing of the center rivet. needless to say, I'll be demilling the kit (again), cutting the receiver up and sending it back to tapco along with a nasty letter. Anyone have a good line on any flats, with trunion holes that are guaranteed to line up with a 1982 romy g kit? or would i be better off just going with a nodak? |
IF you expect plug-n-play, go with a nodakspud With any flats, expect to need the dremmel. Sorry bro, but most of your issues are software related. someone should be around shortly to tell you how you should have handled your mistakes and the other build issues. |
If you think your going to get off any easer with an Ak builders flat you better think again. Here is a pic of one having the top rails machined, not to mention that you have to drill the front and back trunnion holes, the rails have to be drilled. The trigger and hammer holes have to be drilled and reamed. If you not looking for the enjoyment out of building and assembling your kit on a home maid receiver then you should take santanatwo advice and go with the plug-n-play from Nodak. 
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Also, typically when bending sheet steel (with a traditional bending tool, not a press & jig), you have to bend the steel approximately 7 degrees BEYOND the perpendicular 90 degree angle you want the steel form to hold... This is because the steel will have some spring-back unless it was formed under a LOT of pressure (in a jig & 12+ ton press) and/or a lot of heat. Even WITH a good jig & press there's sometime some spring back. With flats you've got a LOT of work on your hands. If you don't want to deal with the hassle of the work - get an NDS receiver. |
Since none else is going to , I'll answer it. the newer tapco flats are in a semi hard state (this is a GOOD THING, because you will only hav eto heat treat the pin holes, not the hole receiver), unlike previous versions, that is why they spring back. the cure, is to either over bend, or clamp the receiver together when you are getting ready to rivet it (which you should be doing anyways, for a good rivet job, so they set right) make a couple of short piece of metal with divots for the rivet heads, then clamp these on with rivets in place, use bolt cutter rivet smasher to smash rivets. the dremmel to the magwell is a COMMON "problem". better to tight then to loose. To tight can be fixed, to loose? not so much. the rear TG rivet needs to be trimmed almost in half so it won't "buckle" crooked. this is normal. and lastly, the reason the center support rivet (reading comprehension is fundamental, guys) was "too short" was because your receiver was still bowing outwards. You should have clamped the receiver to bring the sides closer, THEN smash the rivet (after the rivet was sticking out of the hole). (a hammer and a buddy to hold stuff) works good BTW, for most of this. I don't even own a press and don't have a buddy and I can still ge this done. (sometimes I have to hold stuff with my feet, sitting on the ground, like a hadji gunsmith...but it gets it done. Anything I left out? BFH = big f***ing hammer. |
All of which makes for a better and more accurate receiver than you will ever get out of a Tapco though. |
+1 |
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